Answer:
Article III, section 1 states that “[t]he judicial power of the United States, shall be vested in one Supreme Court, and in such inferior courts as the Congress may from time to time ordain and establish.” The judges presiding over such courts must be appointed by the president “by and with the advice and consent of the Senate” and hold their offices “during good behavior[.]” Their salaries cannot be reduced. Operating under its Article I, section 8 power to “constitute” federal tribunals, Congress has created several courts staffed by judges holding these protections who exercise the “judicial power” contemplated in Article III. These courts are commonly known as “Article III” or “constitutional” courts. The latter moniker can be confusing, as the Constitution does not oblige Congress to create any particular court and such courts routinely hear non-constitutional disputes.
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The federal court system has three main levels: district courts (the trial court), circuit courts which are the first level of appeal, and the Supreme Court of the United States, the final level of appeal in the federal system. There are 94 district courts, 13 circuit courts, and one Supreme Court throughout the country.
Courts in the federal system work differently in many ways than state courts. The primary difference for civil cases (as opposed to criminal cases) is the types of cases that can be heard in the federal system. Federal courts are courts of limited jurisdiction, meaning they can only hear cases authorized by the United States Constitution or federal statutes. The federal district court is the starting point for any case arising under federal statutes, the Constitution, or treaties. This type of jurisdiction is called “original jurisdiction.” Sometimes, the jurisdiction of state courts will overlap with that of federal courts, meaning that some cases can be brought in both courts. The plaintiff has the initial choice of bringing the case in state or federal court. However, if the plaintiff chooses state court, the defendant may sometimes choose to “remove” to federal court.
Cases that are entirely based on state law may be brought in federal court under the court’s “diversity jurisdiction.” Diversity jurisdiction allows a plaintiff of one state to file a lawsuit in federal court when the defendant is located in a different state. The defendant can also seek to “remove” from state court for the same reason. To bring a state law claim in federal court, all of the plaintiffs must be located in different states than all of the defendants, and the “amount in controversy” must be more than $75,000. (Note: the rules for diversity jurisdiction are much more complicated than explained here.)
Criminal cases may not be brought under diversity jurisdiction. States may only bring criminal prosecutions in state courts, and the federal government may only bring criminal prosecutions in federal court. Also important to note, the principle of double jeopardy – which does not allow a defendant to be tried twice for the same charge – does not apply between the federal and state government. If, for example, the state brings a murder charge and does not get a conviction, it is possible for the federal government in some cases to file charges against the defendant if the act is also illegal under federal law.
Federal judges (and Supreme Court “justices”) are selected by the President and confirmed “with the advice and consent” of the Senate and “shall hold their Offices during good Behavior.” Judges may hold their position for the rest of their lives, but many resign or retire earlier. They may also be removed by impeachment by the House of Representatives and conviction by the Senate. Throughout history, fourteen federal judges have been impeached due to alleged wrongdoing. One exception to the lifetime appointment is for magistrate judges, which are selected by district judges and serve a specified term.
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