US imposes 50% tariffs on $20 billion of Canadian imports after trade talks collapse

The US imposed 50% tariffs on roughly $20 billion of Canadian imports after negotiations collapsed on August 21, 2026. Trump had paused the levies three days earlier, saying a deal was close, but no agreement was reached. US Trade Representative Greer said Canada declined to finalise terms it had accepted earlier; Carney called last-minute US changes "unfair, uneconomic."