The U.S.–Canada trade talks broke down on Aug. 21. Although both sides hold completely different views, they agreed on two common dealbreakers: bilateral coordination on Canada’s future trade deals with third countries and how deep tariff-rate cuts should go across sectors like autos, steel, and aluminum. A third, exempting U.S. companies from having to feature French-language content on streaming platforms, was resolved on Aug. 27 when the United States dropped the demand. Analysts say both sides share one other thing: the China factor, which neither names but looms over both positions.Neither the Canadian Prime Minister Carney nor U.S. Trade Representative...