Trump has become increasingly concerned about Canada’s ability to defend its Arctic territory and has urged it to strengthen defences.

Go north? It isn’t just Greenland: Trump is privately ramping up his focus on another target in the Western Hemisphere, increasingly complaining to aides in recent weeks about Canada’s vulnerability to U.S. adversaries in the Arctic, according to officials familiar with the discussions.

The next stop on Donald Trump’s world tour—or takeover—may be America’s northern neighbor. The president, 79, has turned his attention toward Canada, fixating on what he sees as vulnerabilities along its northern border that could be exploited by U.