Congress has the power to set up and organize all what below the supreme court?

Congress has the authority to establish and organize all lower federal courts beneath the Supreme Court, including Courts of Appeals and District Courts. This power is granted by Article III of the U.S. Constitution, allowing Congress to determine the structure and jurisdiction of the federal judiciary. Additionally, Congress can create specialized courts for specific issues, such as tax or military matters, as needed. This organizational power ensures an efficient judicial system to address a variety of legal matters.