The US Constitution is known as the 'supreme law of the land' due to its legal authority and the rights it guarantees to citizens.
The document referred to as the "supreme law of the land" is the US Constitution. One of the key reasons for this is the supremacy clause found in Article VI, which establishes the Constitution as the highest legal authority in the United States. The Constitution outlines the framework for the government's structure, while the Bill of Rights guarantees essential freedoms to the American people.
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