Under the Supremacy Clause, what happens when federal law conflicts with state law?

Under the Supremacy Clause, what happens when federal law conflicts with state law?

• A. Federal law prevails in conflicts with state law
• B. The Constitution requires both to be applied equally
• C. Local ordinances prevail
• D. State laws can never conflict with federal laws

Answer: (A)

The Supremacy Clause establishes that the Constitution and federal laws made pursuant to it are the supreme law of the land, binding over state constitutions and state laws. When a federal law is valid and in effect, any state law that conflicts with it must give way—the federal rule prevails to ensure national uniformity. In practical terms, if a state tries to enforce a provision that directly contradicts a federal statute or treaty, that conflicting part of the state law is rendered invalid to the extent of the conflict, while the state can still regulate in areas not covered or preempted by federal law. This is the mechanism that keeps federal standards from being overridden by conflicting state rules and preserves a coherent national legal framework.