The Risk of Rights audits the Bill of Rights one amendment at a time. This is the tenth and last. Terms per Black’s Law Dictionary. Reporting on documents, not legal advice.
The amendment
“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.” — U.S. Const. amend. X (ratified 1791)
What it protects
Not a personal liberty like speech or silence, but a structural right: the guarantee that the federal government has only the powers the Constitution actually gave it, and that everything else stays with the states and the people. It is the Bill of Rights’ answer to the fear of a national government that recognizes no limit — the textual promise that “in all cases whatsoever” is not Washington’s to claim.
The terms, per Black’s
- Reserved powers — Black’s Law Dictionary (12th ed. 2024): the powers not granted to the federal government nor prohibited to the states, retained by the states and the people under the Tenth Amendment.
- Anticommandeering — per Black’s tradition, the doctrine that the federal government may not compel states to enact or enforce a federal regulatory program.
- Enumerated powers — the specific, listed powers granted to the federal government; a list understood as a limit.
The record today
Federal power has grown vast enough to test the amendment every day. As our Grievance Audit on federalism detailed, the enumerated powers — especially the Commerce and Spending Clauses — expanded across the twentieth century to touch nearly every corner of American life the Founders assumed would stay local. Measured against 1791, the federal government’s practical reach would astonish the generation that wrote “reserved to the States.”
But — and this makes the Tenth an outlier in the Bill of Rights — the courts still enforce its outer wall. Unlike most rights in this series, whose protective edges are quietly eroding, the Tenth Amendment’s core limit is actively, visibly defended:
- Under the anticommandeering doctrine, Washington cannot force states to administer federal programs — New York v. United States, 505 U.S. 144 (1992), and Printz v. United States, 521 U.S. 898 (1997).
- It cannot coerce states through the spending power beyond a point — NFIB v. Sebelius, 567 U.S. 519 (2012), struck down the Affordable Care Act’s Medicaid-expansion mandate as unconstitutionally coercive.
- It cannot commandeer a state’s own legislative choices — Murphy v. NCAA, 584 U.S. 453 (2018).
And in 2025, the structure worked at the sharp end. When federal troops were sent into American cities over governors’ objections, it was state sovereignty — and courts willing to enforce it — that pushed back, up to a 6–3 Supreme Court, as our standing-armies audit recounted. The Tenth Amendment is not just a parchment limit; in the year’s biggest federal-versus-state confrontations, it had teeth.
By the numbers
- Vast but bounded — the honest one-line verdict on federal reach today: enormous, yet still limited at the edges (see Grievance Audit No. 13)
- 1992 / 1997 / 2012 / 2018 — New York, Printz, NFIB, Murphy: the Court actively enforcing Tenth Amendment limits on federal power (U.S. Supreme Court)
- 2025 — state sovereignty and the courts checking federalized troop deployments up to a 6–3 Supreme Court (see Grievance Audit No. 3)
- Enforced, not just declared — unlike most rights in this series, the Tenth’s outer limit is one courts still actively police
The counterweight
State both sides, because this one has two strong ones. To the charge that the Tenth is hollow: federal power has swelled far past what the Founders pictured, and for much of the twentieth century the amendment was dismissed as a “truism” with no independent force — a critic can fairly say its wall now sits so far out that it constrains almost nothing that Washington actually wants to do. To the charge that the Tenth is dead: the anticommandeering and coercion cases show it plainly is not, and a national government strong within its sphere was the Constitution’s deliberate design, not a betrayal of it — the Supremacy Clause exists on purpose. The honest reading holds both: the federal government is far more powerful than 1791 imagined, and the Tenth Amendment still marks a boundary the courts will enforce.
That combination is why the Tenth scores better than most of its neighbors in this series. Its promise has been stretched — but not, like the civil jury or the Fourth Amendment, quietly routed around. When it is tested, it still answers.
The audit
The 1791 promise was that the federal government holds only its listed powers, and the rest belongs to the states and the people. The 2026 record is a federal government vastly larger than that promise anticipated — checked, still, by a Tenth Amendment the courts continue to enforce at its outer wall, as 2025’s troop-deployment fights proved in real time. The reach is enormous. The limit is real. Among the ten, that combination counts as a relative success.
Potestas stricte interpretatur — power is strictly construed. The Founders wrote the Tenth Amendment so the government’s list of powers would have an end. The modern question is only how far out that end now sits — but that there is an end, the courts still insist.
This concludes the ten entries of The Risk of Rights. The tally — each amendment graded, 1791 against 2026 — is set out in the Scorecard.
Sources:
- U.S. Const. amend. X — text of the Tenth Amendment
- New York v. United States, 505 U.S. 144 (1992) — anticommandeering
- Printz v. United States, 521 U.S. 898 (1997) — anticommandeering
- NFIB v. Sebelius, 567 U.S. 519 (2012) — Spending Clause coercion limit
- Murphy v. NCAA, 584 U.S. 453 (2018) — anticommandeering
- Freedom Beagle — Grievance Audit No. 13: Federalism — fuller treatment of federal-vs-state power
- Black’s Law Dictionary (12th ed. 2024) — definitions: reserved powers; anticommandeering; enumerated powers