What is the primary source of Constitutional Law in the United States?

The primary source of Constitutional Law in the United States is the U.S. Constitution and State Constitutions. This choice is correct because the Constitution is the foundational legal document that establishes the framework for federal government and its relationship with the states and citizens. It outlines the structure of government, delineates powers among branches, and protects individual rights through the Bill of Rights and subsequent amendments.

State Constitutions are also significant as they provide the framework for state governments and can offer additional rights or procedures that are not present in the federal Constitution. Together, both the U.S. Constitution and state constitutions govern legal principles and rights across the country, making them the bedrock of Constitutional Law.

Federal Law and State Law, while important, derive their authority from the Constitution or are interpreted through its framework, rather than being the primary sources themselves. International Treaties, on the other hand, can influence law but are not a primary source of Constitutional Law; their interpretation is generally guided by the constitutional provisions that govern treaty approval and implementation.