When do the federal courts have exclusive jurisdiction to hear a case? Over what types of cases do the federal courts have concurrent jurisdiction? Over what types of cases do the federal courts have diversity jurisdiction?

Federal courts have exclusive jurisdiction to hear cases involving federal crimes, bankruptcy, patents, copyright, trademarks, admiralty, antitrust, suits against the United States and suits involving federal statutes that expressly provide for exclusive federal jurisdiction. Federal courts have concurrent jurisdiction with state courts to hear cases involving federal questions (cases arising under the Constitution, statutes, and treaties of the United States) and diversity of citizenship cases where the amount in controversy is more than $75,000. Diversity of citizenship cases exist when the parties are citizens of different states or when a foreign country brings an action against U.S. citizens or when the controversy is between U.S. citizens and citizens of a foreign country.