What four types of case are included in the federal courts jurisdiction?

Federal courts have jurisdiction over four main types of cases: cases involving federal law, cases involving the U.S. Constitution, cases in which the U.S. government is a party, and cases between citizens of different states (diversity jurisdiction) where the amount in controversy exceeds a specified threshold. These cases ensure that Federal Laws and constitutional rights are upheld uniformly across states. Additionally, federal courts may hear certain specialized cases, such as those involving maritime law or bankruptcy.