The president keeps insisting that the borderline between the U.S. and Canada is “artificial.” It’s worth asking why he’s fixated on this.

A meeting between the leaders of Canada and the United States is not usually considered a high-stakes showdown

Despite the leaders’ early comments lavishing praise on one another, the meeting between President Donald Trump and Canadian Prime Minister Mark Carney produced a curious exchange in which Carney emphatically said his country would never become part of the United States and Trump continued to muse that annexing the ally could still happen.