Powers Reserved to States and People
10th Amendment to the United States Constitution
What does the Powers Reserved to States and People mean?
The Tenth Amendment affirms that the federal government possesses only those powers delegated to it by the Constitution, and that all other powers are reserved to the states or to the people. It serves as the textual foundation for federalism and states' rights.
Source: U.S. Const. amend. 10
Original Text
“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.”
Plain-English Explanation
The Tenth Amendment affirms that the federal government possesses only those powers delegated to it by the Constitution, and that all other powers are reserved to the states or to the people. It serves as the textual foundation for federalism and states' rights.
The Supreme Court has used the Tenth Amendment to limit federal power in some contexts, particularly to prohibit Congress from "commandeering" state legislatures or state executive officials to implement federal regulatory programs. However, the amendment has not been interpreted as an independent limit on Congress's enumerated powers — rather, it simply confirms that powers not granted to the federal government remain with the states.
Key Doctrines
Landmark Cases
New York v. United States
(1992)Established the anti-commandeering doctrine, holding that Congress cannot compel state legislatures to enact or enforce a federal regulatory program, though it may offer incentives.
Printz v. United States
(1997)Extended the anti-commandeering doctrine to state executive officials, holding that Congress cannot require state law enforcement officers to conduct background checks under the Brady Handgun Violence Prevention Act.
National Federation of Independent Business v. Sebelius
(2012)While upholding the ACA's individual mandate under the taxing power, held that the Medicaid expansion was unconstitutionally coercive, as it threatened to withhold all existing Medicaid funding from states that refused to expand coverage.
Exam Relevance
The Tenth Amendment is central to federalism questions on constitutional law exams. Know the anti-commandeering doctrine, the distinction between commandeering and preemption, conditional spending limits, and how the Tenth Amendment interacts with Congress's enumerated powers under the Commerce Clause and Spending Clause.
Modern Applications
- Sanctuary city policies and federal attempts to condition funding on immigration enforcement cooperation
- State marijuana legalization and federal drug enforcement
- State challenges to federal environmental and education mandates
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