What is the jurisdiction of a federal court?

Federal courts have jurisdiction primarily over federal law, treaties, and matters related to the Constitution. This means that they are authorized to hear cases involving violations of federal statutes, disputes between states, and cases involving foreign diplomats, among others. The jurisdiction of federal courts is defined by the U.S. Constitution and federal statutes, which clearly outline the types of cases that federal courts are empowered to decide.

The reason why federal law, treaties, and the Constitution comprise the core of federal court jurisdiction is rooted in the structure of the U.S. legal system, where federal law takes precedence over state law. Thus, when a case involves a question of federal law or a constitutional issue, it falls within the purview of federal courts. This jurisdiction is crucial for maintaining a uniform interpretation and application of federal laws across the nation.