Greenland is important for the United States' national security, U.S. Congressman Mike Waltz said on Wednesday, following comments by U.S. President-elect Donald Trump suggesting the U.S. should take control of the island.

The Danish foreign minister expressed openness to working more closely with the U.S. to ensure its interests in the region are addressed after President-elect Donald Trump said he wants to buy the Danish territory of Greenland—but the foreign minister continued to cast doubt on Trump’s idea to acquire the island.