Answer: The Supremacy Clause of the US Constitution
The Supremacy Clause ensures the Constitution is the supreme law of the land and the foundation of government. The Supremacy Clause establishes that the US Constitution is above any state law enacted or other law that is passed. Any other laws and government actions must be in accordance with the nation's Constitution. The Supremacy Clause is the second clause of Article VI of the Constitution. It is stated as follows: