U.S. President-elect Donald Trump said he would not rule out using military or economic action to acquire the overseas Danish territory after he takes office on Jan. 20.

The president-elect sees overseas territory as vital to U.S. interests and suggests he isn’t bluffing in threats to take over allies.

Donald Trump has reiterated his interest in buying Greenland, threatening to levy tariffs on Denmark and not ruling out military force to acquire the island. Greenland is a self-ruling Arctic territory that is part of Denmark,

U.S. President-elect Donald Trump refused on Tuesday to rule out using military or economic action to pursue acquisition of the Panama Canal and Greenland, part of a broader expansionist agenda he has promoted since winning the Nov.