Final answer:
Cases involving DC and US territories are handled by the United States District Courts, which have specific rules and jurisdictions for federal questions and diversity of citizenship.
Step-by-step explanation:
When it comes to cases involving DC and US territories, there are specific rules and jurisdictions in place. The United States District Courts are responsible for hearing cases that involve federal questions, such as those related to the Constitution, federal laws, or treaties, or cases involving the U.S. government as a party. These courts also handle cases that involve interstate matters or diversity of citizenship between parties of different states, or between a U.S. citizen and a citizen of another nation, with a damage claim of at least $75,000.