Who is recognized as the final interpreter of the US Constitution?

The U.S. Supreme Court is recognized as the final interpreter of the Constitution. This authority is derived from the role of the Court in the American judiciary system, where it serves as the highest court in the land. The principle of judicial review, established in the landmark case Marbury v. Madison (1803), allows the Supreme Court to evaluate laws, executive actions, and lower court decisions to determine their constitutionality. This function solidifies the Court's position as the ultimate arbiter of constitutional questions, ensuring that the Constitution remains the supreme law of the land.

In contrast, Congress has the authority to create laws, and the President executes these laws, but neither branch has the final say on constitutional interpretation. Similarly, while state supreme courts interpret state laws and constitutions, their decisions can be reviewed by the U.S. Supreme Court, affirming its position as the final interpreter of the federal Constitution.