What is an example of a violation of the 10th Amendment?

10 amendment simplified: what the amendment says and why it matters

Text and plain-language meaning

The Tenth Amendment says that powers not delegated to the federal government are reserved to the states or the people. This simple reservation sets the baseline for how federal and state power are divided in the U.S. constitutional system, and it matters because it frames disputes about whether Congress may require states or state officials to act in particular ways. For a straightforward legal overview of the amendment and its role in modern doctrine, see the Legal Information Institute summary at the Legal Information Institute.

Put plainly, the amendment does not give states new powers; it confirms that when the Constitution does not grant a power to the federal government, that power belongs to state governments or to individuals. Courts use the provision as a starting point to decide whether a federal law improperly reaches into areas that the Constitution leaves to states, rather than as a source of specific state authority. The Legal Information Institute provides a short, accessible explanation of this baseline function of the amendment, which helps explain why debates about federalism often begin with the Tenth Amendment.

Why the Tenth Amendment matters for federalism today

The amendment matters because it limits how far Congress can go when a statute would directly bind state legislatures or require state officers to carry out federal tasks. Modern doctrine treats the amendment as central to the question of whether a federal law commands state action in a way that the Constitution forbids. Authoritative summaries and analyses explain that this baseline principle informs the anti-commandeering inquiry used by courts when federal statutes touch on state responsibilities, and those summaries are a practical place to start when evaluating claims of constitutional violation.

A brief history: how courts developed the modern Tenth Amendment doctrine

Early interpretations vs modern doctrine

Historically, constitutional disputes often centered on whether federal power extended into areas once managed by state governments. Over time the Supreme Court shaped a modern approach that both recognizes broad federal powers where the Constitution allows them and preserves limits where federal law would commandeer state functions. The shift toward a focus on limits to federal coercion of states appears most clearly in late 20th century decisions that treat direct federal compulsion of state legislatures and officers as constitutionally problematic. For a trusted review of the amendment’s modern use, see the Legal Information Institute overview.

The rise of anti-commandeering in the late 20th century

The anti-commandeering concept took clearer shape in a series of cases in the 1990s and later, when the Court rejected statutory schemes that effectively required states to adopt or enforce federal programs. Those decisions made a doctrinal line between permissible federal regulation and impermissible orders that would turn state legislatures or state officers into instruments of federal policy. New York v. United States and Printz v. United States are the principal early decisions that developed that line, and legal analysts treat those opinions as foundational to the modern anti-commandeering rule.

The anti-commandeering rule explained

What commandeering means in practice

Commandeering means a federal law directly requires a state legislature to pass or refrain from passing a law, or it directs state executive officials to take specified actions for the federal government. In practice, this looks like federal text that leaves no real choice to states or their officers, instead framing state entities as implementers of federal decisions. The Supreme Court has repeatedly explained that such direct compulsion of state lawmaking or state execution crosses the constitutional line, and summaries of those opinions note this practical definition of commandeering.

When courts examine whether a provision commandeers a state, they look to the statutory text and structure to see whether the federal statute actually commands state legislation or officer action, rather than simply preempting conflicting state law or offering funds to encourage state steps. That distinction matters because preemption and incentives work differently in constitutional analysis than direct orders to states. The Congressional Research Service has summarized how courts distinguish commandeering from other federal techniques.

When courts examine whether a provision commandeers a state, they look to the statutory text and structure to see whether the federal statute actually commands state legislation or officer action, rather than simply preempting conflicting state law or offering funds to encourage state steps. That distinction matters because preemption and incentives work differently in constitutional analysis than direct orders to states. The Congressional Research Service has summarized how courts distinguish commandeering from other federal techniques.

Why courts treat commandeering differently from preemption and incentives

Preemption occurs when federal law displaces conflicting state law, but it does not normally require state legislatures or officers to act in a specified way; thus preemption can be constitutional even where commandeering would not be. Incentives and conditional grants offer states a choice: accept federal funds and meet conditions, or decline and retain autonomy. Courts treat those mechanisms as different because they preserve a state decision rather than removing it. For a careful discussion of these distinctions, readers may consult analyses by legal scholars and government research offices.

Key Supreme Court cases that show what a Tenth Amendment violation looks like

New York v. United States (1992) – state ‘take title’ provision

In New York v. United States the Court examined a federal statute that in one part effectively required states to take title to certain radioactive waste if they did not meet federal rules. The Court held that this portion of the statute commandeered state authority by forcing state legislatures into a federal scheme, and it struck that part down. The decision marks an early clear limit on Congress’s power to require state governments to implement federal regulatory goals, and the case text is available from the Legal Information Institute.

Printz v. United States (1997) – background-check duties

Printz v. United States involved a federal requirement directing local law enforcement officers to conduct background checks as part of a federal firearms regulation. The Supreme Court held that Congress could not compel state officers to perform those federal duties, because doing so would improperly commandeer state executive functions. The opinion explains that federal direction of state officers in this way conflicts with the constitutional structure that separates federal and state responsibilities, and the case opinion is available at the Legal Information Institute.

Murphy v. NCAA (2018) – prohibition on state authorization

In Murphy v. National Collegiate Athletic Association the Court applied the anti-commandeering rule to strike down a federal provision that effectively told states they could not authorize sports betting. The Court found that singling out states and forbidding them from authorizing a particular activity was a form of commandeering, because it attempted to control state lawmaking rather than regulate private conduct directly. The opinion and its discussion of the anti-commandeering principle are available in the case text at the Legal Information Institute.

A short checklist to spot a likely Tenth Amendment violation

Core questions courts ask

Use these core questions as a first-pass screen when you read a federal statute: 1) Does the statutory text command a state legislature to pass or repeal a law? 2) Does it direct state executive officers to take specific actions for the federal government? 3) Or does the statute instead preempt state law or offer incentives and funding choices? Answering these questions helps separate likely commandeering from permissible federal approaches, and legal summaries explain this approach in practical terms.

Step through the text slowly. If the law says a state must enact a rule, or it orders a state official to carry out a federal program, that is a red flag for commandeering. If the law instead states a federal rule that displaces conflicting state law, or it conditions federal funds on voluntary state compliance, the analysis is different and courts have often treated those techniques as constitutional in many contexts.

How incentives and preemption usually differ

Incentives let states choose whether to participate, and preemption sets national rules that apply directly to private parties or displace conflicting state laws. Both can be strong federal tools without being commandeering, because they preserve a role for state choice or operate directly against private actors. For an accessible government analysis that outlines these distinctions, see a Congressional Research Service report that reviews how the anti-commandeering doctrine fits within broader federalism questions.

Clear examples from precedent: how the Court applied the rule

Walkthrough: New York v. United States

Statute. One provision of the federal statute in New York placed a peculiar pressure on states: it required states to take title to radioactive waste if certain federal conditions were not met. Question. Did that provision amount to a federal command to state legislatures? Court reasoning. The Supreme Court said yes, explaining that the provision effectively coerced state lawmaking by giving states no real choice, and it invalidated that portion of the statute. Practical takeaway. When federal text makes a state do a thing that only state lawmaking can accomplish, courts are likely to treat that as commandeering and strike it down; the New York decision is the core example of that logic, and the opinion can be read at the Legal Information Institute.

Walkthrough: Printz v. United States

Statute. The federal law required certain background-check duties to be performed by local law enforcement officers. Question. Could Congress compel state or local officers to perform those federal duties? Court reasoning. The Supreme Court concluded that forcing state officers to administer a federal regulatory program would violate the constitutional separation of state and federal functions. Practical takeaway. A statute that treats state officers as federal agents by commanding them to carry out federal tasks is likely to be invalid under the anti-commandeering principle, and the Printz opinion explains the Court’s view in detail.

Walkthrough: Murphy v. NCAA

Statute. A federal provision prevented states from authorizing sports betting, effectively telling states they could not change their laws to permit that activity. Question. Does forbidding states from authorizing conduct amount to commandeering? Court reasoning. The Supreme Court held that telling states they may not authorize an activity interferes with state lawmaking power and is therefore a form of commandeering. Practical takeaway. A federal rule that operates by restraining state legislative choices about what their laws can permit may be treated as constitutionally suspect under the anti-commandeering framework, as the Murphy opinion shows.

Borderline and mixed cases: where the rule is harder to apply

When preemption, incentives, and commandeering overlap

Not all statutes fit neatly into one category. Some laws combine preemption language, conditional grants of funding, and regulatory requirements in ways that make the legal question close. Courts in recent years have acknowledged that mixed statutes require careful reading of the statutory text and the overall structure to determine whether the statute actually commands state action or instead leaves the state with meaningful choice. The constitutional disputes hub on this site discusses related federalism questions.

Why courts decide mixed cases case-by-case

When a statute mixes techniques, judges look closely at how the provisions work together in practice. A single clause that looks like an incentive may be paired elsewhere with language that leaves states little real choice, and that overall structure can alter the constitutional analysis. Legal analysts caution that outcomes depend on statutory context, so a cautious, clause-by-clause reading is often necessary to predict how a court might rule.

Common mistakes and how to avoid them

Confusing preemption with commandeering

Readers often treat preemption and commandeering as the same mistake. Preemption displaces conflicting state law but generally does not force state legislatures or officers to enact federal programs. Commandeering is specifically about federal orders to state governments. To avoid the error, check whether the federal text is addressing private parties or instead directing state lawmaking or state officers to do something. If it is the latter, that is where the anti-commandeering concern belongs.

Misreading incentive programs as coercion

Another frequent error is to assume that any federal incentive is coercive. Courts recognize a line between permissible offers of federal funds and offers that cross into coercion, and the presence of a choice for the state usually points away from commandeering. Always look for whether accepting federal funds is voluntary and whether the statute retains a genuine state choice about action.

Practical implications for states, officials, and the public

What state legislatures and officials need to watch for

If a court finds that a federal statute commandeers a state, the practical effect is that courts will prevent the federal government from forcing state officials or legislatures to enact or implement that federal measure. That does not mean federal regulation as a whole is barred; federal actors may still regulate private conduct directly or use conditional grants and preemption where constitutional. For guidance on these implications, authoritative analyses such as Congressional Research Service reports offer a careful discussion of how commandeering holdings affect federal-state interactions.

For individuals, a holding that a provision is commandeering typically means the federal government cannot rely on state agents to enforce that particular federal program. In some cases the federal agency may instead seek other lawful means to achieve policy goals, but the immediate effect is a check on federal power to enlist states in active enforcement. Readers should consult primary opinions and summaries for authoritative explanations of downstream effects in specific cases.

A step-by-step reader guide to evaluating a statute

Read the text: key phrases to look for

Step 1: Read the statutory language for direct commands. Watch for phrases that tell a state legislature what to pass or tell state officers what to do. Those are the clearest red flags for commandeering. Compare the statute’s language to how courts described commands in leading opinions to see if the text functions the same way.

Map who the statute directs and how

Step 2: Identify the actor the statute addresses. If the directive is aimed at private actors, the federal government is usually regulating directly. If the directive targets state legislatures or state officers, the anti-commandeering concern is more likely to apply. Step 3: Check for preemption or incentives that provide a genuine choice. Step 4: If the text is mixed or unclear, consult the structure of the statute and authoritative analyses before drawing conclusions, and consider seeking legal counsel for a definitive view.

Sample scenarios: how the checklist applies in practice

Hypothetical 1: a federal law ordering states to set penalties

Scenario. Imagine a federal statute that says each state must enact a particular penalty for a given offense. Analysis using the checklist. The text commands state legislatures to adopt a law, which is the classic form of commandeering described by the Court in past cases, so a court would likely treat that provision as unconstitutional. This is an illustrative example, not a definitive legal judgment, and it resembles the core logic in New York v. United States where a federal provision left states little real choice.

Hypothetical 2: a federal law conditioning grants on state legislation

Scenario. Suppose Congress offers federal grants but makes them available only if states pass a certain statute. Analysis. Conditional grants that leave states the option to accept or decline generally differ from direct commands, because the state retains a meaningful choice. Courts have tended to treat conditional grants and incentives as a permissible federal technique in many settings, though outcomes can turn on the strength of the pressure and the statutory details, and close cases must be decided with careful statutory analysis.

What readers should not assume: limits of the doctrine

When federal rules still apply even after a commandeering holding

Do not assume that finding a commandeering violation invalidates all federal authority in an area. A court may strike a provision that commands state action while leaving intact other federal measures that regulate private behavior or that use constitutional tools like preemption. The distinction between striking a commandeering clause and invalidating all federal power in a field is important for understanding the practical scope of a Tenth Amendment ruling.

Why a Tenth Amendment win does not automatically create new state authority

When a court blocks a federal commandeering provision, that outcome does not automatically expand state power beyond existing law. The ruling removes the federal demand on states but does not itself create new state authority that did not previously exist. For accurate interpretations of what a decision does and does not do, readers should consult the primary opinions and authoritative summaries rather than rely solely on headlines.

Recap checklist and key takeaways

Short recap of the practical checklist

Recap. 1) Does the statute command state legislatures? 2) Does it direct state officers to act for the federal government? 3) Or does it preempt or offer conditional funding instead? These three lines of inquiry form a compact checklist readers can use to evaluate possible Tenth Amendment violations.

Top three takeaways

Takeaways. First, the anti-commandeering rule is the primary judicial tool for identifying Tenth Amendment violations that involve forced state action. Second, preemption and incentives are different legal tools and often constitutional when properly applied. Third, mixed or borderline statutes require close textual and structural analysis and may be decided on a case-by-case basis, so cautious reading and primary sources are essential.

Where to read the primary sources and trusted analyses next

Primary case texts to consult

Read the full opinions of New York v. United States, Printz v. United States, and Murphy v. NCAA to see how the Court analyzed statutes and applied the anti-commandeering rule. These opinions are publicly available through law school and legal reference sites that host Supreme Court texts, and they give the clearest insight into how the doctrine developed.

Reliable legal summaries and reports

For accessible explanations and neutral analysis, consult the Legal Information Institute summaries and Congressional Research Service reports. These sources provide concise context and often summarize the Court’s reasoning and the practical implications for states and federal policy, making them useful next steps for readers who want primary material plus authoritative commentary.