Which Part of the Constitution Reserves Powers Not Delegated to the Federal Government to the States and the People: Tenth Amendment Text, Three Test Cases, and Two Misreadings

The Tenth Amendment is the part of the Constitution that reserves powers not delegated to the federal government to the states and the people. Ratified December 15, 1791, it reads: "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 "or" matters — the clause points to two separate reservoirs, not one. Understanding which reservoir applies in a given dispute is the whole game, and the Supreme Court has never settled it with a single test.

The Clause's Exact Text and the Three Conditions That Must All Hold

Break the sentence into three parts and the logic becomes visible. First, a power must not be delegated to the United States by the Constitution. Second, it must not be prohibited to the states. Third, only then is it reserved. All three conditions must hold simultaneously, which means a power can fail the test at any step and end up either federal or forbidden to everyone.

The word "delegated" is doing quiet work here. It implies the federal government has only what was handed to it — a premise James Madison pressed in Federalist No. 45, where he wrote that the powers delegated to the federal government are "few and defined" while those remaining with the states are "numerous and indefinite." That framing assumes the Constitution created a government of enumerated powers, not a government of general jurisdiction.

The closing phrase "or to the people" is the least litigated and most philosophically loaded part. It acknowledges that some authority sits with neither government — individual rights, for instance, which the Ninth Amendment separately protects. Read together, the Ninth and Tenth Amendments cover two different gaps: the Ninth addresses rights the enumeration of the Bill of Rights might have seemed to disparage, while the Tenth addresses powers the enumeration of Article I might have seemed to swallow.

A practical consequence follows. If you're arguing that a state should regulate something, the Tenth Amendment is your textual hook. If you're arguing that a right belongs to an individual regardless of either government's action, the Ninth is the better anchor. The two are often cited as a pair in litigation, but they answer different questions.

Why the Amendment Was Added: Anti-Federalist Pressure and Madison's Reluctance

The Tenth Amendment was not in the Constitution sent to the states in 1787. It emerged from the ratification fight, where Anti-Federalists like Patrick Henry and George Mason argued that a document without a bill of rights would let Congress assume undelegated authority. Madison initially resisted, then reversed course partly to neutralize that objection in Virginia, where ratification was close.

Madison's original draft, introduced in the House on June 8, 1789, had a different structure. It read that the powers not delegated "are reserved to the States respectively, or to the people" — but he also proposed inserting the word "expressly" before "delegated." The House accepted it; the Senate removed it. That single deletion is why the modern clause says "delegated" rather than "expressly delegated."

The deletion was not accidental. Had "expressly" survived, the federal government would arguably have been limited to powers spelled out in so many words, gutting doctrines like implied powers and the Necessary and Proper Clause. Removing the word preserved flexibility for Congress — and, in the bargain, made the Tenth Amendment far weaker as a limit than Anti-Federalists had hoped.

Historian context matters for anyone citing original intent. The amendment passed the House on August 21, 1789, and was ratified with the rest of the Bill of Rights when Virginia became the eleventh state to approve on December 15, 1791. That date is the operative one for constitutional arguments about the founding generation's understanding.

Three Test Cases That Show the Clause Working — and Failing

Garcia is the one people forget. The 1985 decision overruled National League of Cities v. Usery (1976), which had tried to carve out "traditional governmental functions" immune from federal regulation. Justice Blackmun, writing for the majority, said the effort to define those functions was "unsound in principle and unworkable in practice" and that states should protect themselves through their representation in Congress — the "political process" theory.

New York and Printz cut back the other way, but on a narrow ground. Both say Congress can't force states to enact or administer federal law. Neither restores the broader National League of Cities idea that some activities are inherently state turf. So the modern doctrine is: no commandeering, but plenty of other federal leverage survives.

That distinction has real consequences. Congress can still offer states money with strings attached — South Dakota v. Dole (1987) upheld conditioning federal highway funds on a 21-year drinking age. In 2012, NFIB v. Sebelius found that expanding Medicaid under the Affordable Care Act crossed from inducement into coercion, threatening states with loss of all existing Medicaid funding. The line between inducement and coercion remains a live question, not a settled one.

The Anti-Commandeering Rule in Plain Terms: What It Forbids and What It Allows

State legislators ask about this constantly, and the answer splits cleanly. The anti-commandeering rule prohibits three things: requiring a state legislature to pass specific legislation, requiring state executive officials to carry out federal directives, and — per Murphy v. NCAA (2018) — commandeering states to enforce a federal ban on private conduct, in that case sports gambling.

It permits much more. Federal law can preempt conflicting state law and has done so since Gibbons v. Ogden (1824), which invalidated a New York steamboat monopoly under the Commerce Clause. Preemption doesn't commandeer; it simply displaces. Congress can also attach conditions to federal grants, and it can regulate private parties directly in ways that incidentally burden states.

The practical checklist for a state official facing a federal directive runs in order. First, ask whether it's a mandate to regulate private conduct or a mandate to administer a federal program. Second, if the latter, check whether Congress gave the state a genuine choice to decline without catastrophic funding loss. Third, check whether the federal agency is imposing the requirement administratively rather than through statute — Printz concerned statutory duties, and agency-driven mandates face unsettled appellate scrutiny in several circuits.

Failure happens at step two far more often than people expect. Consider a state that accepts a federal grant covering 40% of its environmental enforcement budget. If Washington later adds new conditions and withdrawal would collapse the program, that state's "choice" may be coercive under Sebelius — but proving coercion in litigation costs years and millions. The practical advice, according to constitutional law scholars who write on conditional spending, is to document the ratio of the condition's cost to total state funding and negotiate before the condition attaches, not after.

Two Misreadings That Circulate Widely — and What the Text Actually Supports

Misreading one: the Tenth Amendment bars anything not explicitly named in Article I. That would be a textual error, since the phrase is "delegated," not "expressly delegated," and the Necessary and Proper Clause delegates implied means. A strict-list reading would also make McCulloch v. Maryland (1819) — which upheld the Bank of the United States — a nullity, and it has been settled law for two centuries.

Misreading two: the Tenth Amendment is a dead letter because the Supreme Court hasn't applied it forcefully. Not so. New York and Printz remain good law and have been cited repeatedly in the last two decades, including by states contesting federal firearms and immigration directives. The amendment is dormant, not defunct, and litigation strategy should treat it as a live tool with a high but not impossible bar.

A third misreading, subtler: treating "the people" as a residual category that individual litigants can invoke against states. The phrase "or to the people" has never been used to invalidate a state law. The Supreme Court's jurisprudence reads it as confirming popular sovereignty in principle, not as a grant of justiciable individual rights. Because of that structural rule, a state law generally can regulate even conduct the federal government cannot reach — subject to the state's own constitution.

The Kentucky and Virginia Resolutions of 1798, drafted by Jefferson and Madison, are the most-cited origin point for state-resistance theory, and they claimed the states could declare the Alien and Sedition Acts void. No court ever ratified that position. It is worth knowing as history and worth avoiding as legal argument — citing the Resolutions in a brief without acknowledging that no court has adopted their position invites a credibility problem. Treat them as the root of a populist strain in American constitutionalism, not an operative rule.

Enumerated, Implied, and Reserved: A Workable Map for Allocation Questions

The map explains most real-world disputes cheaply. If both columns are blank, the Tenth Amendment fills the gap. If the federal column contains an Article I hook, the reserved column is displaced to the extent of the hook — a matter of scope that depends on Commerce Clause and Spending Clause jurisprudence, both of which have fluctuated over time.

The Commerce Clause is where the map does the most work. From Wickard v. Filburn (1942), which reached a farmer growing wheat for his own consumption, through United States v. Lopez (1995), which struck down the Gun-Free School Zones Act as not substantially affecting interstate commerce, and Gonzales v. Raich (2005), the Court has never fully settled the outer boundary. That instability means the reserved category is never a fixed size — it contracts and expands with Commerce Clause doctrine.

Compare similar provisions in state constitutions and the contrast sharpens. Many state constitutions, including most of the original thirteen, operate as general grants of legislative power, not enumerations. That's why a state legislature can pass a bill without finding a textual authorization. The Tenth Amendment only reserves what the federal Constitution doesn't touch — and because the states have general power, the reservation is broad but contested at the margins.

Litigation Path When a Federal Rule Collides With State Authority

Here's the sequence a practitioner typically follows, with the failure points that matter.

1: Identify the claim. Confirm the dispute is about commandeering, preemption, or coercion — not merely about policy disagreement. A state cannot sue claiming the Tenth Amendment just because Congress's choice was unwise. 2: Establish standing. A state must show injury to its sovereignty as a state, not as a market participant. For instance, state ownership of an asset used commercially is on the wrong side of New York. 3: Preserve the claim. Raise the Tenth Amendment in pleadings or in the contemporaneous administrative record. Courts have declined to hear a Tenth Amendment claim when it was raised late. Litigators familiar with Printz-style cases describe this step as the one most often missed by state counsel. 4: Choose timing. Decide whether to seek declaratory relief before implementation or injunctive relief against enforcement. The former preserves choice; the latter puts funding at risk. 5: Handle the safeguarding clause. Many federal statutes contain a provision requiring state agencies to submit a plan. If you refuse compliance while accepting funds, document the refusal and notify the federal agency in writing.

The failure handling should be explicit. If the court finds the state lacks standing, the case ends at the threshold without reaching the merits, and the state may be subject to a compliance deadline anyway. Plan the interim posture — seeking an administrative stay while the claim proceeds — and name the agency contact who can confirm a briefing schedule. In the worst case, a state that litigates and loses may face loss of federal funds with no cost recovery.

Constitutional Amendments That Altered the Balance Since 1791

Several amendments after the Tenth changed the allocation the 1791 text assumed. The Thirteenth (1865) and Fourteenth (1868) imposed obligations on states that the original reservation had not contemplated, and the Fourteenth's Due Process and Equal Protection Clauses mean the federal government can now review state action for fundamental-rights and discrimination claims. The Fifteenth, Nineteenth, and Twenty-Fourth similarly removed state control over voting. These all narrowed the practical scope of "reserved" even though none amended the Tenth Amendment's text.

The Seventeenth Amendment (1913) altered state power by making senators popularly elected rather than chosen by state legislatures. It is frequently cited in Tenth Amendment commentary as the structural change that most eroded a state's institutional ability to defend itself in the Senate, and it is the reason the "political process" theory in Garcia rests on shakier ground than its author assumed.

The Eighteenth Amendment (1919) and its repeal by the Twenty-First (1933) are the cleanest case study of the amendment path as a Tenth Amendment tool. The Eighteenth delegated a power the Constitution had not delegated — regulating the manufacture and sale of alcohol — and the Twenty-First then gave a narrower part of it back to the states. That's the amendment method for changing the reservation, and it's the only method the text itself offers.

Federalism Questions That Come Up Next

What's the difference between the Ninth and Tenth Amendments, and does it matter for my case?

The Ninth addresses rights retained by the people that the enumeration of other rights might be construed to disparage; the Tenth addresses powers retained by the states or the people. For a challenge to a state law on privacy or liberty grounds, the Ninth is largely symbolic and the Fourteenth's Due Process Clause carries the weight. For a challenge to a federal command to a state legislature, the Tenth is the operative clause. Filing under the wrong one costs time, not just credibility.

Does the Tenth Amendment limit the federal government's power over private citizens?

No, and this answer is short. It addresses the states as states. A private party cannot use the Tenth Amendment to escape a valid federal statute, because the reserved category covers governmental authority that was never delegated — not individual exemptions. The federal government can regulate a private party if an Article I hook reaches the conduct, subject to the Commerce Clause doctrine described above.

What does it mean that the Supreme Court struck down the "expressly" language in 1789?

It means the Tenth Amendment does not require Congress to point to a specific enumerated power for every action. The Necessary and Proper Clause can supply the authority. If you're drafting an argument that a federal statute exceeds delegated power, you have to show the statute fails not just the enumerated list but also McCulloch's implied-powers standard. The omission of "expressly" is why the text has never been used to invalidate a federal statute by itself.

Which states cite the Tenth Amendment most often, and does the article's list include any protection for marijuana legalization under it?

States citing it tend to be represented by attorneys general concerned with regulatory autonomy — the majority of the states, not a particular bloc. On marijuana, the answer is that state legalization statutes do not use the Tenth Amendment to override federal law; they rely on a federal enforcement policy that has varied by administration. No court has accepted a Tenth Amendment defense against the Controlled Substances Act. Consult a licensed attorney in your jurisdiction before relying on any state-federal conflict theory.

How does the Tenth Amendment apply to the District of Columbia?

It doesn't, because D.C. is not a state. The reservation runs to "the States respectively, or to the people," and the District is neither. Federal legislation governing the District is not subject to the anti-commandeering bar. That is why you see arguments about D.C. statehood framed as structural and represented in Congress rather than as a Tenth Amendment question.

This article is general educational information about constitutional text and doctrine, not legal advice, and no outcome is promised. Consult a licensed attorney in your state, and verify current doctrine through the Supreme Court's published opinions and your state bar's resources before acting.