What is the Supremacy Clause, and what effect does it have on state laws?

• A. It makes the Constitution, federal laws, and treaties the supreme law of the land, overruling conflicting state laws.
• B. It allows states to override federal laws.
• C. It requires all states to have the same legal system.
• D. It only applies to treaties, not laws.

Answer: (A)

The Supremacy Clause says that the Constitution, federal laws, and treaties made under the authority of the United States are the supreme law of the land. Because of that, when a state law conflicts with any of those, the federal rule wins and the state rule is invalid to the extent of the conflict. This creates nationwide consistency and ensures that federal priorities aren’t undermined by state laws in areas covered by federal authority. Treaties are included in this framework, so a treaty binds states just as federal statutes do. In practice, if a state law contradicts a federal statute or a valid treaty, the federal provision governs. States can regulate in areas not preempted by federal law, but they cannot override or contradict it.