Is the federal government's power limited by what it cannot do?

Federal and state powers and the Tenth and Fourteenth Amendments | Khan Academy · 4:41 · Video: Khan Academy · Watch at the source

In short: The Tenth Amendment serves as a constitutional boundary, asserting that any power not explicitly granted to the federal government belongs to the states or the people. It transforms the debate over civil liberties into a question of jurisdiction: is a government action a violation of rights, or simply an overreach of authority?

The Tenth Amendment was ratified on December 15, 1791, emerging from intense debates during the ratification of the Bill of Rights. While some framers, like Alexander Hamilton, feared that listing specific rights would imply the government had the power to infringe upon them, others insisted on the amendment to protect state sovereignty from an overreaching national government.

Any authority not granted to the US, and not forbidden to the states, remains with the people or the individual states. This distinguishes the federal government as a limited, enumerated entity. Because the emerging federal authority grew, states sought to safeguard 'police powers'—which typically encompassed welfare, education, and health.

The tension between state and federal authority has been tested through landmark Supreme Court cases. For example, in 1958, Cooper v. Aaron ruled that Arkansas could not delay school desegregation, while in 1995, United States v. Lopez struck down federal 'gun-free zones' on school campuses because no segment of the Constitution authorized such federal action. This ruling specifically limited the federal government's ability to enact policies through the Commerce Clause.

Following the Civil War, states began acting as 'laboratories of democracy,' a term coined by Justice Louis Brandeis. States like Wyoming experimented with social policies, such as granting women the right to vote in 1869. However, the Supremacy Clause in Article VI ensures that federal law remains superior to state law. This creates a complex legal landscape where state experiments, such as marijuana legalization, often clash with federal prohibitions, as seen in the 2005 Gonzales v. Reich ruling.

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