The Elephant in the Canadian Room

America is surging ahead while Canada stagnates, and that growing asymmetry—not trade alone—is driving the acrimony between two longtime allies. At first glance, the current American-Canadian trade “war” is absurd. We are neighbors with a long history of close friendship, speak the same language (for the most part), and spring from the same British civilization. Nearly one million Canadians reside in the United States. Given the two countries’ natural affinities, Canadians are nearly indistinguishable from Americans. Both sides have reasonable grievances over trade policy. Americans don’t like Canada’s perennial trade surpluses of more than $50 billion in a supposedly free-trade...