President-elect Trump has spent parts of the holiday season vowing to take over the Panama Canal, calling for the U.S. to buy Greenland from Denmark and suggesting Canada could become the 51st state.

It's unclear how the issue of ownership of the Panama Canal became a talking point for President-elect Donald Trump this week, but the question has a long political history.

Donald Trump has been threatening to take over sovereign territories and reclaim control of the Panama Canal, and sources revealed the motives for his bluster.The president-elect has been fascinated with buying Greenland since his first term in the White House,