What is the supreme law of the United States?

The supreme law of the United States is the United States Constitution. This foundational document establishes the framework for the national government and delineates the rights of the states and the citizens. It serves as the highest legal authority in the country, meaning that any laws or actions by governmental bodies must conform to the principles and stipulations outlined within it.

The Constitution not only sets up the structure of the government, detailing the powers of the executive, legislative, and judicial branches, but also includes vital provisions regarding individual liberties and protections. This comprehensive nature is what solidifies its status as the supreme law.

In contrast, while the Bill of Rights consists of the first ten amendments to the Constitution and protects individual freedoms, it does not supersede the entire Constitution, which encompasses broader governmental frameworks and principles. The Preamble, on the other hand, serves as an introduction to the Constitution's goals and purposes but does not carry legal authority itself. The Federal Register, being a collection of governmental proceedings and regulations, is also a subordinate document that acts within the framework established by the Constitution.