How might the theory of states rights undermine the federal government?

In American political discourse, states' rights refers to political powers reserved for the state governments rather than thefederal government according to the United States Constitution, reflecting especially the enumerated powers of Congress and the Tenth Amendment. The enumerated powers that are listed in the Constitution include exclusive federal powers, as well as concurrent powers that are shared with the states, and all of those powers are contrasted with the reserved powers—also called states' rights—that only the states possess.

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