What is the controversy with the 10th Amendment? A clear guide

What the Tenth Amendment says and why it matters

Text and plain meaning: tenth amendment explained

The Tenth Amendment states that powers not delegated to the federal government are reserved to the states or to the people, a short text that serves as the constitutional baseline for federalism disputes.

This compact wording functions as a starting point for legal argument about the division of authority, rather than as a separate grant of power to states, and scholars and courts use that baseline when weighing federal claims. See our Tenth Amendment explainer.

How the Amendment fits into federalism

In practice, the Amendment anchors debates over federalism and states rights by reminding courts that the federal government is one of limited, enumerated powers.

Legal commentary often treats the Amendment as a textual reminder about constitutional structure, not as a free standing source of authority for state action, which is why careful textual and structural analysis matters when cases reach the courts Legal Information Institute overview of the Tenth Amendment

The anti-commandeering doctrine and the key Supreme Court cases

New York v. United States: limits on commanding state legislatures

New York v. United States held that Congress cannot force state legislatures to enact or administer federal regulatory programs, a holding that placed a clear limit on one form of federal power.

That decision framed one branch of the anti-commandeering doctrine by distinguishing between permissible federal regulation of individuals and forbidden commands that would make state legislatures implement federal policy New York v. United States, U.S. Supreme Court opinion

Printz v. United States: limits on commanding state executives

Printz v. United States extended the anti-commandeering rule by holding that Congress may not compel state executive officers to carry out federal regulatory tasks, so federal laws cannot require state officials to perform federal administrative duties.

That ruling created a second clear line in federalism law, one that protects state executive authority against certain federal impositions while leaving other federal powers intact Printz v. United States, U.S. Supreme Court opinion

Following the logic from those two cases, courts assess whether a federal measure goes beyond regulating individuals and instead instructs states or state officers to implement federal policy, a distinction that is often central to litigation over federal programs.

Murphy v. NCAA: applying anti-commandeering in modern statutes

Murphy v. NCAA applied the anti-commandeering principle to strike down a federal provision that prohibited states from authorizing sports gambling, demonstrating how the doctrine can invalidate a federal restriction on state lawmaking authority.

The decision shows that even modern federal statutes that regulate the choices available to states can fall within the anti-commandeering rule when they effectively commandeer state legislative power Murphy v. NCAA case page at Oyez

How courts decide federalism disputes: tests, sources, and thresholds

Text, structure, and history in judicial reasoning

Courts use a combination of textual analysis, structural arguments, and precedent when they resolve federalism disputes, looking at the Constitution’s language, the document’s structure, and prior decisions to guide interpretation.

Judges often start with the text and then ask whether the statute fits within Congress’s enumerated powers or instead directs states to act, a step that draws on the Tenth Amendment as a structural cue in constitutional analysis Legal Information Institute overview of the Tenth Amendment

Where tests touch on funding and coercion, recent scholarship and commentary examine how spending conditions can be challenged; see a Harvard Law Review analysis of funding conditions and related doctrine.

When anti-commandeering applies versus when Congress can lawfully act

Anti-commandeering applies when a federal law directs state legislatures or officers to adopt or enforce federal policy, but it does not prevent Congress from regulating private conduct within its enumerated powers.

Where questions are closer, courts compare the statutory text to the framework from New York and Printz and consider whether the federal scheme leaves states a genuine choice or instead coerces them into action, a nuanced inquiry that often depends on precedent and context Printz v. United States, U.S. Supreme Court opinion

Role of conditional spending and cooperative federalism

Rather than direct commands, Congress frequently uses conditional federal funding and cooperative programs to encourage state participation in national priorities, approaches that raise separate legal questions about pressure versus compulsion.

Scholarly analysis notes that conditional funding and incentives are common alternatives to commands, but courts will still evaluate whether a funding condition is so coercive that it effectively compels states, which is a continuing area of doctrine and debate Brookings overview of federalism and the Tenth Amendment

Common controversies and misunderstandings about the Tenth Amendment

Misreading the Amendment as a free pass for absolute state authority

A frequent misunderstanding is treating the Tenth Amendment as allowing states to ignore valid federal law, but the Amendment does not itself invalidate federal statutes and does not justify nullification by states.

Courts read the Amendment alongside other constitutional provisions and precedent, and they do not accept claims that the Amendment alone frees states from laws within Congress’s constitutional powers Legal Information Institute overview of the Tenth Amendment

Confusing anti-commandeering with immunities or sovereign immunity

Anti-commandeering is not the same as state sovereign immunity, which concerns whether a state can be sued in federal court without consent; the two doctrines address different constitutional questions.

Legal commentary highlights that mixing these concepts can lead to error when assessing a state’s legal protections or a federal law’s reach, which is why precise terminology matters in public debates SCOTUSblog analysis of Murphy v. NCAA

Overstating the Amendment’s ability to nullify federal law

An additional mistake is suggesting the Tenth Amendment allows states to nullify federal law outright, an approach courts have consistently rejected in modern constitutional practice.

Instead, challenges to federal law under the Tenth Amendment proceed through doctrines like anti-commandeering and through ordinary judicial review, not through state level nullification claims Legal Information Institute overview of the Tenth Amendment

Practical examples: how the doctrine affects policy areas today

Immigration enforcement and state cooperation

Anti-commandeering has been raised in litigation over immigration enforcement where the federal government seeks state cooperation, because courts examine whether federal measures improperly require state actors to implement federal policy. See discussion of state-federal immigration powers and relevant legal commentary, including a detailed Lawfare analysis on whether the federal government can compel state enforcement.

Commentators have noted that the doctrine constrains some federal approaches that depend on direct state action, prompting federal agencies to rely more on incentives and voluntary partnerships in this area Brookings overview of federalism and the Tenth Amendment

Scholarship and policy reviews describe how designers of environmental programs balance national aims with respect for state administrative roles, using conditional grants and cooperative frameworks as tools to avoid commandeering problems Brookings overview of federalism and the Tenth Amendment

Public health collaborations and emergency responses

Public health collaborations and emergency planning show similar dynamics, where federal authorities often prefer coordination and incentives rather than direct orders that would require state officials to execute federal plans.

Legal observers point out that anti-commandeering forms part of litigated debates about how far federal emergency measures may reach when they rely on state personnel or agencies to act SCOTUSblog analysis of Murphy v. NCAA

How policymakers and states respond: conditional funding and cooperative strategies

Designing conditional grants and incentives

Policymakers commonly use conditional spending to encourage state cooperation on national priorities, writing program terms that offer funds in exchange for state action while trying to avoid legal coercion.

As commentators explain, these incentive based designs allow federal goals to advance without issuing commands that would trigger anti-commandeering constraints, though the legal line between persuasion and coercion remains contested Brookings overview of federalism and the Tenth Amendment

Interstate compacts and voluntary cooperation

States also use interstate compacts, memoranda of understanding, and voluntary partnerships to tackle cross border problems without federal commands, relying on collaborative structures that preserve state choice.

These mechanisms show how practical governance can respect the contours of federalism while enabling joint action on issues from infrastructure to environmental protection Brookings overview of federalism and the Tenth Amendment

Open legal questions for 2026

By 2026, open questions include how conditional funding may be tested as coercive, how new regulatory designs interact with anti-commandeering, and whether courts will further refine the doctrine in areas like immigration and public health.

Observers expect continued litigation and scholarly analysis as policymakers experiment with incentive based models and cooperative arrangements Brookings overview of federalism and the Tenth Amendment

Conclusion: What the controversy means for voters and where to find reliable sources

Short recap of the core dispute

The core controversy centers on how the Tenth Amendment and the anti-commandeering decisions limit federal power when laws would require state legislatures or officers to carry out federal programs.

Understanding the line drawn in New York, Printz, and Murphy helps voters see why federal designs that rely on state action can be subject to constitutional challenge New York v. United States, U.S. Supreme Court opinion

Where to read primary sources and trustworthy analysis

For primary sources consult the Supreme Court opinions and official case pages, and for policy overviews look to published legal commentary and academic reviews when evaluating arguments about federalism.

Primary opinions and reputable policy centers provide the best starting points for verification and deeper reading, and see our constitutional rights overview for curated links and explanations Brookings overview of federalism and the Tenth Amendment