Preemption | Wex | US Law | LII / Legal Information Institute
Federal Preemption. When state law and federal law conflict, federal law displaces, or preempts, state law, due to the Supremacy Clause of the Constitution. U.S. Const. art. VI., § 2. Preemption applies regardless of whether the conflicting laws come from legislatures, courts, administrative agencies, or constitutions.
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