Nullification (U.S. law)

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Nullification, in United States constitutional history, is a legal theory that a state has the right to nullify, or invalidate, any federal laws that they deem unconstitutional with respect to the United States Constitution (as opposed to the state's own constitution). There are similar theories that any officer, jury, or individual may do the same. The theory of state nullification has never been legally upheld by federal courts. The theory of nullification is based on a view that the states formed the Union by an agreement (or "compact") among the states, and that as creators of the federal government, the states have the final authority to determine the limits of the power of that government. Under this, the compact theory, the states and not the federal courts are the ultimate interpreters of the extent of the federal government's power. Under this theory, the states therefore may reject, or nullify, federal laws that the states believe are beyond the federal government's constitutional powers. The related idea of interposition is a theory that a state has the right and the duty to "interpose" itself when the federal government enacts laws that the state believes to be unconstitutional. Thomas Jefferson and James Madison set forth the theories of nullification and interposition in the Kentucky and Virginia Resolutions in 1798. Courts at the state and federal level, including the U.S. Supreme Court, have repeatedly rejected the theory of nullification. The courts have decided that under the Supremacy Clause of the Constitution, federal law is superior to state law, and that under Article III of the Constitution, the federal judiciary has the final power to interpret the Constitution. Therefore, the power to make final decisions about the constitutionality of federal laws lies with the federal courts, not the states, and the states do not have...