What document is established as the supreme law of the land by the supremacy clause?

The US Constitution is established as the supreme law of the land by the supremacy clause, which is found in Article VI, Clause 2 of the Constitution itself. This clause asserts that the Constitution, along with federal laws made pursuant to it, and treaties made under its authority, takes precedence over any state laws. This means that in instances of conflict between state and federal law, the Constitution and federal law prevail.

The Bill of Rights, while a crucial component of the Constitution that protects individual liberties, does not serve as the supreme law on its own. The Declaration of Independence, though pivotal in American history, primarily outlines the principles on which the nation was founded and does not function as a legal document or law. The Federalist Papers are a collection of essays authored to advocate for the ratification of the Constitution and provide insights into the framers' intentions, but they do not carry legal authority themselves. Thus, the correct response emphasizes the role of the Constitution in establishing legal supremacy within the U.S. legal framework.