What drives the United States’ bold geopolitical ambitions toward Greenland and Canada? It boils down to economic and national security.

Denmark's last minister for Greenland says Britain once claimed right of first refusal over the territory — because of its proximity to Canada, which Britain once ruled.

Some of Trumps threats to take over Greenland, Canada, and the Panama Canal are based on actual U.S. strategic goals. Others are just idiotic.