U.S.-Canada trade war escalates with new tariffs and threats for 2026

A trade war between the U.S. and Canada escalated, with new tariffs taking effect and more threatened for 2026. The dispute has triggered retaliation threats and uncertainty for auto parts and other industries. President Donald Trump doubled proposed auto tariffs to 50 per cent, effective Jan. 1, covering vehicles and parts. Prime Minister Mark Carney shifted from dollar-for-dollar retaliation to targeted measures, with Canadian tariffs planned for Sept. 8 unless talks resume. Key upcoming dates include by-elections Aug. 31, a Canada Investment Summit Sept. 14-15, U.S. midterms Nov. 3, and the new Congress convening Jan. 3. Most Canadian firms expect minimal AI impact on staffing.