The supremacy of federal law refers to the principle established by the U.S. Constitution that federal laws take precedence over conflicting state laws when there is a conflict between them.
Related terms
Federalism: A system where power is divided between national/federal government and state governments.
Commerce Clause: A constitutional clause granting Congress the power to regulate interstate commerce.
McCulloch v. Maryland (1819): A landmark Supreme Court case that established principles related to federal supremacy and implied powers.