What document serves as the supreme law of the land in the U.S.?

The Constitution is the supreme law of the land in the United States, establishing the framework for the federal government, delineating powers among its branches, and guaranteeing certain rights to the citizens. It was designed to create a system of governance that balances authority between state and federal levels, allowing for flexibility and adaptation over time.

The Bill of Rights, while critical in protecting individual liberties, is an integral part of the Constitution itself rather than a standalone document that serves as the ultimate legal authority. The Declaration of Independence, although a foundational text asserting the colonies' intent to separate from British rule, does not function as a governing document. The Articles of Confederation were the first attempt at a governing framework for the United States but were eventually deemed ineffective, leading to the drafting of the current Constitution. Thus, the Constitution holds a unique position, recognized in Article VI of the document itself as the definitive source of law in America.