Which court holds the highest authority in the U.S. judicial system?

The Supreme Court holds the highest authority in the U.S. judicial system because it serves as the final arbiter on matters of federal law and constitutional interpretation. Established under Article III of the U.S. Constitution, the Supreme Court has the power to review decisions made by lower courts, including both the District Courts and the Courts of Appeals. Its rulings set binding precedents that all other courts in the United States must follow. This role is crucial in maintaining the uniform application of law across the country and in resolving conflicts that may arise between state and federal courts or among states. The Supreme Court's authority is further underscored by its ability to interpret the Constitution, making it the highest court and the ultimate authority in the U.S. judicial system.