He has said the U.S. will take control of Greenland eventually and has not ruled out military intervention, alarming American allies, particularly Denmark. The U.S. has a military

Danish Prime Minister Mette Frederiksen has issued a stern warning to the Trump administration following reports that U.S. intelligence agencies have been ordered to increase surveillance efforts targeting Greenland.

The prospect of American annexation has reinvigorated ties between the island and Copenhagen, though aspirations for independence persist.