Federalism in Practice: Who Has the Power?

One of the most important questions in American constitutional law is deceptively simple:

Who has the power to do this?

Can Congress regulate it?
Can a state regulate it?
Can both?
Can the federal government prohibit a state from doing something?
Can a state refuse to participate in a federal program?
And when federal and state governments appear to have authority over the same subject, how do we determine where one government’s power ends and the other’s begins?

These are questions of federalism.

Federalism is the constitutional division of governmental authority between the United States government and the states. Unlike a unitary system, in which the national government possesses ultimate authority over local government, the American constitutional system gives both the federal government and the states substantial spheres of governmental power. The Constitution grants specific powers to the federal government while leaving substantial authority to the states.

But federalism is not simply a list of subjects belonging to Washington and another list belonging to the states.

The difficult cases occur precisely where the spheres overlap.

A person might be employed by a private company operating across state lines, live under state criminal and property law, receive federal benefits, pay both federal and state taxes, and participate in an activity regulated simultaneously by federal and state governments.

The practical question therefore is not:

Federal government or state government?

It is:

What constitutional source of power supports each government’s action, and what limits apply to that power?

That is the central problem of federalism in practice.

Cornell Legal Information Institute — Federalism

---

1. What Is Federalism?

Federalism is a system in which governmental authority is constitutionally divided between a national government and smaller territorial governments.

In the United States, those smaller governments are the states.

Both levels of government possess genuine lawmaking authority.

Congress can enact federal statutes.

State legislatures can enact state statutes.

Federal agencies can issue regulations within their delegated authority.

State agencies can regulate matters within state authority.

Federal courts interpret federal law.

State courts interpret state law and also decide many questions involving federal law.

The Constitution therefore does not create one government with subordinate administrative branches.

It creates a federal system of divided sovereignty.

Cornell’s Legal Information Institute describes American federalism as a system of “dual sovereignty,” in which states retain substantial sovereignty while certain powers have been entrusted to the federal government.

The result is a constitutional relationship rather than a simple chain of command.

---

2. Why Did the Constitution Create Federalism?

The framers faced a difficult problem.

The government under the Articles of Confederation was considered too weak to deal effectively with national problems.

But replacing it with an all-powerful national government would create another danger.

The states had existed as political communities before the Constitution.

They possessed their own governments, laws, courts, political traditions, and local interests.

The constitutional solution was therefore neither complete state independence nor complete national centralization.

It was federalism.

The Constitution created a national government capable of acting on matters requiring national coordination while preserving substantial governmental authority in the states.

This was especially important in areas such as:

• local government;
• education;
• state criminal law;
• property law;
• family law;
• public safety;
• state courts;
• licensing;
• local taxation;
• and many aspects of health, welfare, and economic regulation.

At the same time, certain matters naturally required national authority.

A country could not function effectively if each state maintained its own completely independent foreign policy, currency, national defense system, or rules governing interstate commerce.

Federalism was therefore an attempt to solve a structural problem:

How can a large nation govern collectively without destroying meaningful local self-government?

---

3. The Starting Point: The Constitution Gives the Federal Government Enumerated Powers

The first rule for understanding federal power is that the federal government is a government of enumerated powers.

Congress does not possess a general constitutional power to legislate on every subject imaginable.

Article I, Section 8 lists important powers granted to Congress.

These include powers to:

• tax and spend;
• regulate interstate and foreign commerce;
• establish naturalization rules;
• establish bankruptcy laws;
• coin money;
• establish post offices;
• create lower federal courts;
• declare war;
• raise and support armies;
• provide and maintain a navy;
• and enact laws necessary and proper for carrying federal powers into execution.

These are called enumerated powers because they are identified in the Constitution.

This creates the first major federalism question:

What constitutional power authorizes the federal government to act?

A federal statute cannot simply be justified by saying that Congress thought the subject was important.

There must be constitutional authority.

---

4. The States Begin From a Different Position

The states operate from a different constitutional starting point.

State governments generally possess broad police powers—the authority to legislate for public health, safety, welfare, and morality, subject to constitutional limitations.

The Constitution does not give states a single exhaustive list comparable to Article I, Section 8.

Instead, the Constitution both recognizes state authority and limits it.

The Tenth Amendment provides:

“The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.”

The Tenth Amendment therefore expresses a central principle of federalism: powers not delegated to the federal government and not prohibited to the states remain outside federal authority.

This does not mean that every subject not expressly mentioned in the Constitution automatically belongs exclusively to the states.

The Constitution contains grants of federal authority that can reach activities with substantial interstate consequences.

The real analysis is therefore more sophisticated.

---

5. Enumerated, Implied, and Reserved Powers

Federalism becomes easier to understand when three categories are separated.

Enumerated powers

These are powers expressly granted to the federal government.

For example:

• regulating interstate commerce;
• taxing;
• spending;
• declaring war;
• establishing naturalization rules.

Implied powers

Some federal powers are not stated in precisely the form in which the federal government exercises them.

The Necessary and Proper Clause allows Congress to make laws necessary and proper for carrying into execution its enumerated powers.

This doctrine was famously developed in McCulloch v. Maryland.

Congress was not expressly told:

“Create a national bank.”

Yet the Supreme Court held that Congress could establish one as an appropriate means of carrying out its constitutional powers.

Reserved powers

Reserved powers are powers retained by the states or the people under the constitutional structure.

This is the basic idea expressed by the Tenth Amendment.

The categories overlap in practice, which is precisely why federalism generates constitutional litigation.

---

6. Concurrent Powers: When Both Governments Can Act

Not every governmental power belongs exclusively to one level of government.

Some powers are concurrent.

For example, both federal and state governments generally possess authority to:

• tax;
• spend;
• borrow money;
• create courts within their respective systems;
• enforce criminal laws;
• and regulate many economic activities within their respective constitutional spheres.

This creates one of the most important practical features of federalism:

The same person may be subject to both federal and state law concerning the same general subject.

For example, conduct may violate both federal criminal law and state criminal law.

A business may be subject to federal regulations and state licensing requirements.

A worker may be protected simultaneously by federal employment law and more protective state law.

A property transaction may be governed by state property law while also being affected by federal tax or environmental law.

Federalism therefore does not necessarily mean choosing one government.

Often, both governments have authority.

---

7. The Commerce Clause: The Great Federalism Engine

One of the most important sources of federal regulatory power is the Commerce Clause.

Article I, Section 8, Clause 3 gives Congress power to regulate commerce:

“among the several States.”

The Commerce Clause has become one of the principal constitutional foundations for federal regulation.

It has been interpreted to allow Congress to regulate:

1. the channels of interstate commerce;
2. the instrumentalities of interstate commerce and persons or things in interstate commerce; and
3. certain activities that substantially affect interstate commerce.

This matters enormously for federalism.

Modern economic life rarely respects state boundaries.

A product may be designed in one state, manufactured in another, transported through several states, sold online, financed through a national banking system, and delivered to a consumer somewhere else.

The question then becomes:

Where does local activity end and interstate activity begin?

That question has generated some of the most important federalism cases in American constitutional history.

---

8. Gibbons v. Ogden: Interstate Commerce

One of the foundational cases is Gibbons v. Ogden (1824).

The dispute concerned competing authority over steamboat navigation between New York and New Jersey.

The Supreme Court interpreted federal power over interstate commerce broadly and rejected a state-granted monopoly that conflicted with federal authority.

The importance of the case extends beyond steamboats.

It established an enduring principle:

Commerce among the states can require national regulation.

This became particularly significant as the American economy became increasingly interconnected.

Federalism therefore had to adapt to a basic reality:

Economic activity can be local in appearance but interstate in effect.

---

9. When Does Local Activity Become a Federal Matter?

This question has no single simple answer.

Consider a hypothetical farm.

A farmer grows wheat solely for personal consumption.

At first glance, that appears to be an entirely local activity.

Why should Congress have anything to do with it?

Yet in Wickard v. Filburn (1942), the Supreme Court accepted a broad understanding of Congress’s Commerce Clause power. The Court reasoned that even local activity could be regulated when, considered in the aggregate with similar activities, it could have a substantial effect on interstate commerce.

The case became one of the most important examples of the breadth of federal economic regulatory power.

But the Court later emphasized that the Commerce Clause has limits.

---

10. United States v. Lopez: There Are Federal Limits

In United States v. Lopez (1995), the Supreme Court struck down a federal law prohibiting possession of a firearm in a school zone.

The federal government argued that the regulation could be connected to interstate commerce.

The Supreme Court rejected the argument.

The decision emphasized that Congress’s Commerce Clause authority is broad but not unlimited. The Court identified the principal categories of commerce regulation and refused to treat virtually any activity as federal simply because it might have some remote economic consequences.

This case is important because it illustrates a fundamental principle:

Federalism requires a distinction between matters of genuinely national concern and matters that remain constitutionally local.

If every activity could be converted into interstate commerce through a sufficiently long chain of reasoning, the enumeration of federal powers would lose much of its meaning.

---

11. Federalism Is Not Just About the Commerce Clause

It is easy to think of federalism as primarily a Commerce Clause issue.

It is not.

Federal authority can arise through several constitutional powers.

Important sources include:

Taxing power

Congress has constitutional authority to impose federal taxes.

Spending power

Congress may spend federal funds to pursue national objectives, subject to constitutional limitations.

War and national defense powers

The federal government has extensive authority concerning national defense and military affairs.

Foreign affairs

The national government possesses authority over international relations that cannot realistically be divided among fifty independent state governments.

Necessary and Proper Clause

Congress can enact appropriate legislation for carrying out its constitutional powers.

Fourteenth Amendment and other constitutional amendments

Some amendments grant Congress enforcement powers that affect the federal-state relationship directly.

Federalism therefore requires lawyers to identify the specific constitutional source of authority involved.

---

12. The Spending Power: Federal Influence Without Direct Command

One of the most interesting forms of federal influence occurs through federal spending.

Congress may offer federal funds to states on specified conditions.

For example, Congress may establish a federal program and provide funding to states that participate.

This creates a constitutional question:

Is the federal government regulating the states directly, or is it offering money subject to conditions?

The distinction matters.

Federal spending can significantly influence state policy even where Congress could not simply order the states to adopt the policy as a matter of direct regulation.

This is one reason federalism is more complicated than a map dividing subjects between Washington and the state capitals.

The federal government can influence state behavior through:

• legislation;
• regulation;
• taxation;
• spending;
• enforcement;
• grants;
• and preemption.

The constitutional validity of such mechanisms depends on the particular power being exercised and the constitutional limits governing it.

---

13. The Anti-Commandeering Principle

Federalism also imposes limits on the federal government’s ability to control the states themselves.

One important doctrine is the anti-commandeering principle.

In general, Congress cannot simply order state governments to administer or enforce a federal regulatory program.

The federal government can regulate individuals and entities within its constitutional authority.

But that does not automatically mean that it can force state governments to become administrative arms of the federal government.

The Supreme Court developed this principle in cases including New York v. United States, Printz v. United States, and Murphy v. NCAA.

The basic idea is important:

Federal supremacy does not mean federal control over every action of state governments.

The Constitution protects a degree of state governmental autonomy.

---

14. New York v. United States

In New York v. United States (1992), the Supreme Court considered a federal statute dealing with radioactive waste.

The federal government had attempted to encourage states to establish systems for dealing with the problem.

The Court held that Congress could not simply command states to legislate in accordance with federal instructions.

This illustrates an important distinction:

Congress may possess authority to regulate a subject itself without necessarily possessing authority to order state legislatures to enact the federal government’s preferred policy.

That distinction is fundamental to constitutional federalism.

---

15. Printz v. United States

In Printz v. United States (1997), the Supreme Court considered federal requirements involving background checks for firearm purchases.

The constitutional issue concerned whether the federal government could require state and local law-enforcement officers to carry out federal regulatory duties.

The Court concluded that the federal government could not commandeer state executive officials in this way.

The principle is significant because it protects the institutional identity of state governments.

Federalism does not merely divide legislative subject matter.

It also protects the structure of state government itself.

---

16. Murphy v. NCAA

In Murphy v. NCAA (2018), the Supreme Court applied the anti-commandeering principle to a federal statute concerning state authorization of sports gambling.

The Court concluded that Congress could not simply instruct states what laws they were forbidden to enact in the manner at issue.

The case reinforced the idea that federalism protects states from being treated merely as administrative units of the national government.

This distinction is crucial:

The federal government may regulate within its constitutional sphere.

But it does not follow that the federal government may always dictate how state governments must legislate.

---

17. Federal Preemption: When Federal Law Controls

The opposite side of the relationship is preemption.

When federal law is constitutionally valid and conflicts with state law, federal law may displace the state rule under the Supremacy Clause.

This can occur through:

• express preemption;
• field preemption;
• conflict preemption.

The question is not simply whether Congress has regulated the subject.

The question is whether federal law actually displaces the state rule in the circumstances presented.

This makes preemption one of the most practical applications of federalism.

A lawyer may encounter a situation in which:

Congress can regulate the subject.

The state can also regulate the subject.

Both governments have enacted rules.

And then the real question becomes:

Can both rules operate simultaneously?

If not, federal supremacy may resolve the conflict.

---

18. Federalism and State Police Powers

State police powers are among the most important practical sources of state authority.

They encompass broad areas of traditional state regulation, including:

• public health;
• public safety;
• criminal law;
• property;
• family relationships;
• education;
• professional licensing;
• local government;
• and many aspects of business regulation.

This is why states can have different rules concerning matters that affect everyday life.

A state may regulate professional licensing differently from another state.

States may establish different property rules.

State criminal codes differ.

Family law differs.

Business regulations differ.

Tax systems differ.

The existence of these differences is not a defect in the constitutional system.

It is one of the consequences—and purposes—of federalism.

---

19. Why State Law Can Differ From State to State

Federalism creates what is sometimes called a laboratory of democracy.

States can experiment with different policies.

One state may adopt a particular regulatory approach.

Another may reject it.

A third may adopt a modified version.

Successful policies can influence other states and eventually the federal government.

This creates policy diversity.

But it also creates practical consequences.

A person who crosses a state border may enter a different legal environment.

A business operating nationwide may have to comply with multiple state regulatory regimes.

This is one of the central tensions of federalism:

Local autonomy creates flexibility, but national markets create pressure for uniformity.

---

20. The Dormant Commerce Clause

Federalism also operates in the opposite direction.

The Constitution gives Congress power over interstate commerce, but the Supreme Court has also recognized constitutional limitations on certain state laws affecting interstate commerce even when Congress has not enacted a specific federal statute governing the subject.

This is known as the Dormant Commerce Clause doctrine.

Among other things, the doctrine can restrict states from discriminating against interstate commerce or imposing certain excessive burdens on interstate economic activity.

This creates an important distinction.

Federalism does not merely ask:

Can Congress regulate the states?

It can also ask:

Can a state regulate interstate commerce in a way that improperly interferes with the national economic union?

The Constitution’s federal structure protects that national economic union as well.

---

21. Federalism and the National Economic Union

The framers had experienced serious economic problems under the Articles of Confederation.

States could pursue policies that favored local economic interests and disadvantaged neighboring states.

A national economy therefore required some degree of legal integration.

The Commerce Clause and the Dormant Commerce Clause reflect this concern.

The Constitution seeks to preserve both:

state autonomy

and

a functioning national economic system.

These objectives can conflict.

A state may want to protect its local businesses.

But if every state does so against businesses from other states, interstate commerce can become fragmented.

Federalism therefore requires constitutional rules capable of preserving both local self-government and national economic integration.

---

22. The Privileges or Immunities and Equal Protection Dimensions

Federalism also intersects with individual rights.

States are not constitutionally free to exercise their powers however they wish.

The federal Constitution places limits on state governments.

The Fourteenth Amendment is particularly important.

It restricts state action through provisions including:

• Due Process;
• Equal Protection;
• and the Privileges or Immunities Clause.

This means that the federal-state question is sometimes not:

“Does the state have this power?”

but rather:

“Even if the state has this power, is the way it is exercising that power constitutionally permissible?”

This is an essential distinction.

Federalism protects state authority.

But state authority exists within the Constitution.

---

23. Federalism and Individual Rights

Consider a state law regulating speech.

The state may ordinarily possess broad police powers.

But that does not settle the constitutional question.

The First Amendment may restrict the state’s action.

Similarly, a state may possess authority over criminal law.

But it cannot impose punishments that violate constitutional protections.

A state may regulate property.

But its actions may be subject to due process and takings principles.

Federalism therefore cannot be separated completely from constitutional rights.

The Constitution simultaneously answers two different questions:

Who has governmental power?

and

What may government do with that power?

The first is primarily structural.

The second is primarily rights-based.

Constitutional law constantly moves between them.

---

24. Federalism and the Courts

Courts play an essential role in determining the boundary between federal and state power.

A federalism dispute may require a court to interpret:

• the Commerce Clause;
• the Necessary and Proper Clause;
• the Spending Clause;
• the Tenth Amendment;
• the Supremacy Clause;
• the Fourteenth Amendment;
• or other constitutional provisions.

The Supreme Court has therefore played a major role in defining the federal-state relationship.

Federalism is not static.

Its practical boundaries have changed as the Court has interpreted constitutional text in response to changing economic, political, and social circumstances.

This is one reason constitutional federalism cannot be understood simply by memorizing a list of subjects.

The important skill is learning to analyze the source and limits of governmental power.

---

25. A Practical Federalism Analysis

When confronted with a federalism problem, a lawyer can work through a structured sequence.

Question 1: Who is acting?

Is the actor:

• Congress?
• a federal agency?
• the President?
• a state legislature?
• a state agency?
• a local government?

Identifying the governmental actor is the first step.

Question 2: What is the government trying to do?

Define the actual governmental action.

Is it:

• regulating;
• taxing;
• spending;
• prosecuting;
• licensing;
• prohibiting;
• requiring;
• or administering?

Question 3: What constitutional power supports the action?

For federal action, identify the constitutional source.

Possible sources include:

• Commerce Clause;
• Taxing Clause;
• Spending Clause;
• Necessary and Proper Clause;
• war powers;
• treaty powers;
• enforcement powers under constitutional amendments.

Question 4: Is the power enumerated or implied?

If the power is not expressly stated, determine whether it can reasonably be derived from an enumerated power.

Question 5: Is the state acting within its traditional authority?

If a state is regulating, consider its police powers and other constitutional authority.

Question 6: Is there a conflict?

If both governments have acted, determine whether their laws can coexist.

Question 7: Does federal law preempt state law?

If federal and state law conflict, apply the Supremacy Clause and preemption principles.

Question 8: Is the federal government commandeering the state?

Even if Congress possesses authority over the underlying subject, determine whether the federal government is improperly requiring state governments or officials to administer federal policy.

Question 9: Does the Constitution independently restrict either government?

Finally, consider constitutional rights and structural limitations.

This sequence prevents a common mistake:

jumping directly to the question of which government is more powerful.

The better question is always:

What constitutional authority does each government possess?

---

26. A Practical Example: Environmental Regulation

Imagine Congress passes a federal environmental statute regulating pollution from industrial facilities.

A state already has its own environmental law.

Several questions immediately arise.

First:

Does Congress have constitutional authority to regulate the subject?

The Commerce Clause may provide the relevant foundation if the activity sufficiently relates to interstate commerce.

Second:

Does the federal statute expressly preempt state law?

If yes, the scope of preemption must be determined.

Third:

If there is no express preemption, can both laws operate together?

If they can, both may remain applicable.

Fourth:

If they conflict, does federal law preempt the state requirement?

The answer may depend upon the precise nature of the conflict and congressional intent.

Fifth:

Could Congress instead order state environmental agencies to administer the entire federal program?

That raises a separate anti-commandeering question.

Notice how many distinct constitutional issues are contained in one seemingly simple question.

That is federalism in practice.

---

27. A Practical Example: Education

Education provides another useful example.

States traditionally exercise substantial authority over public education.

States establish school systems, determine educational standards, regulate teachers, and structure local school districts.

But federal law can also affect education.

Federal funding may come with conditions.

Federal constitutional rights apply to public schools.

Federal statutes may prohibit discrimination.

Federal courts may review state educational practices for constitutional violations.

The result is not that either Washington or the states possess absolute control.

Instead:

State authority remains substantial, while federal constitutional and statutory authority can operate within its own sphere.

---

28. A Practical Example: Criminal Law

Criminal law is traditionally associated strongly with state authority.

Each state has its own criminal code.

State police investigate crimes.

State prosecutors bring charges.

State courts conduct criminal trials.

But federal criminal law also exists.

Congress can create federal crimes where constitutionally authorized.

The same conduct can sometimes violate both state and federal law.

This does not necessarily create a constitutional contradiction.

The federal and state governments are separate sovereigns with separate legal systems.

Federalism therefore allows overlapping criminal jurisdiction in appropriate circumstances.

The important question becomes:

What authority supports each prosecution, and what other constitutional doctrines apply?

---

29. Federalism Does Not Mean Fifty Completely Separate Legal Systems

The United States has fifty state governments, but federalism does not mean that each state is legally isolated from the others.

The Constitution creates a national legal framework that connects them.

Examples include:

• the Supremacy Clause;
• the Commerce Clause;
• the Full Faith and Credit Clause;
• privileges and immunities principles;
• federal constitutional rights;
• federal courts;
• and federal statutes.

This creates a balance between diversity and national unity.

States can remain different without becoming completely independent countries.

That distinction is fundamental to understanding the American constitutional system.

---

30. Federalism and the Full Faith and Credit Clause

Another important mechanism connecting the states is the Full Faith and Credit Clause.

Article IV requires states to give appropriate recognition to the public acts, records, and judicial proceedings of other states.

This helps prevent state borders from becoming legal barriers to the recognition of judgments and other legal acts.

For example, a judgment obtained in one state may need to be recognized and enforced in another.

Federalism therefore requires not only rules dividing power between federal and state governments.

It also requires rules governing relationships among the states themselves.

---

31. Federalism as a Constitutional Compromise

Federalism is sometimes described as a compromise.

But it is more than a historical compromise.

It is a continuing constitutional principle.

The American system simultaneously values:

• national unity;
• state autonomy;
• individual liberty;
• democratic self-government;
• national economic integration;
• local experimentation;
• and constitutional limits on government.

These values do not always point in the same direction.

National uniformity may conflict with local autonomy.

Local experimentation may conflict with national economic interests.

Federal regulation may protect individual rights while also increasing national governmental power.

State regulation may preserve local democracy while producing different legal protections from one state to another.

Federalism exists precisely because these competing values must coexist.

---

32. The Central Question: Who Has the Power?

When studying federalism, it is tempting to memorize:

• Congress does this;
• states do that;
• federal law wins here;
• state law wins there.

That approach is incomplete.

A better method is to ask a series of constitutional questions.

Who is acting?

What are they trying to do?

What constitutional provision gives them authority?

Is that authority exclusive or concurrent?

Does another level of government possess overlapping authority?

Does federal law preempt state law?

Is the federal government impermissibly commandeering the states?

Does the Constitution independently restrict the action?

Those questions transform federalism from a list of abstract doctrines into a practical method of legal reasoning.

---

Conclusion

Federalism is the constitutional system through which the United States divides governmental authority between the federal government and the states.

But the division is not a simple geographical separation of subjects.

Federal and state authority frequently overlap.

Congress may regulate interstate commerce while states regulate local business.

Both governments may tax.

Both may enact criminal laws.

Federal programs may influence state policy through spending.

Federal statutes may preempt conflicting state laws.

Yet the federal government cannot simply command state governments to administer federal programs whenever it wishes.

And state governments cannot exercise their powers in ways that violate the federal Constitution or improperly interfere with constitutional national interests.

The practical question is therefore not merely:

Who is more powerful?

It is:

What power does the Constitution give this government, what limits does the Constitution place upon that power, and how does that authority interact with the power of the other level of government?

That is the essence of federalism.

Federalism is ultimately a constitutional architecture of shared, divided, overlapping, and competing governmental authority.

Its purpose is not to make the boundaries between governments perfectly simple.

Its purpose is to make those boundaries constitutionally manageable.

---

Key Takeaways

• Federalism divides governmental authority between the federal government and the states.
• The federal government operates primarily through enumerated constitutional powers.
• States retain broad authority, particularly through their traditional police powers and powers reserved under the Tenth Amendment.
• Some powers are concurrent, meaning both federal and state governments may exercise them.
• The Commerce Clause is one of the most important sources of modern federal regulatory authority.
• The federal government does not possess unlimited Commerce Clause power; cases such as United States v. Lopez demonstrate constitutional limits.
• Federal authority can also arise from taxation, spending, national defense, foreign affairs, the Necessary and Proper Clause, and constitutional amendment enforcement powers.
• Preemption determines when valid federal law displaces conflicting state law.
• The anti-commandeering doctrine limits the federal government’s ability to require states themselves to administer federal programs.
• The Dormant Commerce Clause can limit certain state laws that discriminate against or improperly burden interstate commerce.
• Federal constitutional rights restrict both levels of government.
• Federalism therefore concerns both who has governmental power and what each government may do with that power.
• The best way to analyze a federalism problem is to identify the governmental actor, the constitutional source of authority, the scope of that authority, possible overlap, possible preemption, and any independent constitutional limitations.

Frequently Asked Questions

What is federalism in simple terms?

Federalism is the constitutional division of governmental power between the United States government and the states. Both levels of government possess genuine governmental authority, although their powers come from different constitutional sources.

Does the federal government have more power than the states?

Not in the sense of possessing unlimited general authority. The federal government has specific constitutional powers, while states retain substantial authority. When valid federal law conflicts with state law, however, the Supremacy Clause generally makes controlling federal law supreme.

What powers belong to the federal government?

Important federal powers include taxation, spending, regulation of interstate commerce, national defense, foreign affairs, naturalization, bankruptcy, and other powers enumerated or constitutionally implied.

What powers belong to the states?

States retain broad authority over matters traditionally associated with local government, including criminal law, property, family law, education, public safety, professional licensing, and many aspects of public health and welfare.

What are concurrent powers?

Concurrent powers are powers that may be exercised by both the federal and state governments. Taxation is a major example. Both governments can also establish courts within their respective judicial systems and regulate various activities within their constitutional authority.

Can federal and state laws regulate the same subject?

Yes. Federalism frequently involves overlapping regulation. The existence of federal regulation does not automatically eliminate state authority. The important question is whether federal law preempts the particular state law.

What is federal preemption?

Federal preemption occurs when valid federal law displaces state law. It can be express or implied and may arise when state and federal requirements conflict or when federal law occupies a regulatory field.

Can Congress order states to enforce federal law?

Generally, Congress cannot simply commandeer state governments or state officials and require them to administer a federal regulatory program. This principle is known as the anti-commandeering doctrine.

What is the Tenth Amendment’s role in federalism?

The Tenth Amendment provides that powers not delegated to the United States by the Constitution, and not prohibited to the states, are reserved to the states or the people. It expresses an important principle of the federal division of authority.

What is the Commerce Clause?

The Commerce Clause gives Congress power to regulate commerce with foreign nations, among the states, and with Native tribes. It has become one of the principal constitutional foundations for federal economic regulation.

Why is federalism difficult to apply?

Because modern life does not fit neatly into separate federal and state categories. Economic activity crosses state borders, people move between states, businesses operate nationally, and federal and state governments often regulate the same general subject.

Does federalism protect states from the federal government?

Yes, but not absolutely. Federalism protects a sphere of state governmental authority and limits certain forms of federal control, including commandeering state governments. At the same time, valid federal constitutional authority can preempt conflicting state law.

Does federalism protect individual rights?

Indirectly and directly. Federalism divides governmental power, which can prevent excessive concentration of authority. But both federal and state governments are also independently constrained by constitutional rights.

Is federalism the same as states’ rights?

They are related but not identical. “States’ rights” emphasizes the authority of states, while federalism describes the broader constitutional structure governing the relationship between federal and state governments. Federalism includes both state authority and legitimate federal authority.

Why does federalism matter in everyday life?

Because Americans live under multiple layers of law. A person’s rights and obligations may be affected simultaneously by federal statutes, state statutes, federal regulations, state regulations, local ordinances, and constitutional rules. Understanding federalism helps explain why different rules can exist at different governmental levels and how conflicts between them are resolved.

Where can I learn more about federalism?

The Cornell Legal Information Institute’s Federalism overview provides a useful starting point, while its materials on the Commerce Clause, enumerated powers, and Supremacy Clause help explain the individual constitutional mechanisms through which federalism operates.

Related Analysis in Constitutional Law

Constitutional Law

Constitutional Law

Constitutional Privacy and the Right to Be Left Alone: Privacy, Liberty, and the Limits of Government Power

Read Module →

Constitutional Law

Constitutional Law

Fundamental Rights and Constitutional Limitations: How Constitutional Rights Are Protected and Restricted

Read Module →

Constitutional Law

Constitutional Law

National Sovereignty 101: Principles and Legal Foundation

Read Module →