What is the highest court in the United States?

The Supreme Court is the highest court in the United States, holding the ultimate authority in interpreting federal law and the Constitution. Established by Article III of the Constitution, it is the final court of appeal in matters of federal jurisdiction and has the power to overturn laws and executive actions that it finds unconstitutional.

The Supreme Court's decisions set significant legal precedents that impact the entire country, and it operates with a limited number of justices, typically nine, who are nominated by the President and confirmed by the Senate. This structure ensures that the Supreme Court serves as a check on legislative and executive powers while safeguarding citizens' rights.

In contrast, the other options listed refer to lower courts or specific types of courts that do not have the same level of authority or influence as the Supreme Court. The District Court is a trial-level court, the Circuit Court handles appeals from District Courts in some jurisdictions, and the Appellate Court specializes in reviewing decisions made by lower courts, but none carry the ultimate appellate power of the Supreme Court.