Read the excerpt from the Constitution of the United States, Article 1, Section 8.[Congress shall have power] to regulate Commerce with foreign Nations, and among the several States. This excerpt reinforces the idea of

Federal Supremacy

Explanation:

Article 1, Section 8 of the Constitution of the United States of America basically allows Congress to "lay and collect taxes, duties, imports, and excises in order to "provide for the common defense and general welfare." Thus reinforcing the idea of Federal Supremacy, meaning that the federal constitution, and federal law generally, take precedence over state laws, and even state constitutions.