The supremacy clause, declaring federal law the supreme law of the land, appears in:

1. The supremacy clause in Article VI proclaims that the Constitution, laws passed by Congress and treaties made by the federal government are the supreme law of the land. 2. In the event of a conflict between the states and the national government, the national government would triumph. 3. Article I instead sets out the structure and powers of Congress, including the necessary and proper clause. 4. Article VII is the adjacent trap: it is the ratification article requiring approval by nine of the thirteen states. _Source: OpenStax American Government 3e (CC BY 4.0), Ch 2 "The Constitution and Its Origins", §2.3 The Development of the Constitution_