Final answer:
The Supreme Court has jurisdiction over cases involving treaties with other nations, specifically under its original jurisdiction. The Court also acts as a court of last appeal and has the power to determine which cases it will hear.
Step-by-step explanation:
The Supreme Court has a role in treaties with other nations. While Article III of the U.S. Constitution does not explicitly mention the Supreme Court's role in treaties, it does establish the Court's jurisdiction and types of cases it may hear. Under its original jurisdiction, the Court can hear cases involving disputes between states or between the United States and foreign ambassadors or ministers.
Furthermore, the Supreme Court acts as a court of last appeal and has the power to determine which cases it will hear. Cases involving ambassadors, foreign ministers, and consuls, as well as cases involving the states as a party, must originate in the Supreme Court. However, the Court typically operates under appellate jurisdiction, hearing cases on appeal from lower courts.