Answer:
All of the following are part of the official jurisdiction of the federal courts EXCEPT
a. treaties with other nations.
Step-by-step explanation:
Official jurisdiction of the federal courts include cases involving the following: federal statutes (laws); cases involving the U.S. Constitution; cases involving citizens of more than one state where less than $75,000 is at stake; and/or any case in which the U.S. government is party.
Treaties with other nations can only be made by the President and ratified by a two-thirds vote in the Senate.