The 10th Amendment declares, "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." It inspired the so called Sagebrush Rebellion that swept the West three decades ago, preventing the federal takeover of public lands pushed by the Carter Administration and propelling the self proclaimed Sagebrush Rebel, Ronald Reagan, to the presidency. Now the Amendment is being invoked by pro gun advocates to press for state, rather than federal, regulation of gun manufacturers.

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