Why don't we just call Crimea the Puerto Rico of Russia.

In 1948, it granted Puerto Ricans the right to elect their own governor. In 1952, under request by the United States, a local territorial constitution was adopted and ratified by the electorate. Under the tenets of the Puerto Rico Federal Relations Act, Puerto Ricans are still subject to the plenary jurisdiction of the U.S. Congress, and the island continues as a U.S. territory.