Andrew Coyne: Pierre Poilievre plants seeds of alternative to Carney doctrine

Andrew Coyne/The Globe and Mail: Still, the differences are striking. Even if it is only a question of emphasis, Mr. Poilievre has opened a legitimate debate. How much can we increase our trade with China, as a means of lessening our dependence on the United States, without becoming too dependent on it? How much would Mr. Poilievre’s proposals increase our “leverage,” and would they make any real difference at the bargaining table? How permanent is the “rupture” with the U.S.? Will everything return to normal after Mr. Trump is gone? Or has something broken in U.S. politics? Can the Democrats return to power any time soon, and if they do, how much change would that imply in the Republicans, or in their attitude toward us?…