Which document defines the framework of the U.S. government?

The Constitution of the United States is the foundational document that establishes the framework of the U.S. government. It outlines the structure, functions, and limits of the government, including the three branches: legislative, executive, and judicial. Additionally, the Constitution sets forth the principles of federalism and the rule of law, and it protects individual rights through the Bill of Rights and subsequent amendments.

In contrast, the Magna Carta, while significant in history for limiting the power of the monarchy, does not specifically define the structure of the U.S. government. The Articles of Confederation served as the first governing document for the United States but proved to be ineffective, leading to the creation of the Constitution to address its weaknesses. The Declaration of Independence was vital for announcing the colonies' separation from Britain and articulating the principles of individual rights and government by consent, but it does not serve as a blueprint for constructing a governmental framework.