President-elect Donald Trump left open the possibility Tuesday that he might use military force to take over the Panama Canal and force Denmark to sell Greenland to the United States, and said he could use “economic force” to make good on his bizarre proposition of annexing Canada.

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 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,