U.S. President-elect Donald Trump says he wants to make Greenland a part of the United States and does not rule out using military or economic power to get Denmark to hand it over.

The president-elect said the United States needed the island, which is a semiautonomous part of Denmark, for national security reasons. But there are other possible interests.

The island’s rare earth minerals and plum Arctic position have turned it into a geopolitical hotspot and the object of American fantasies.