Summary
U.S. President Donald Trump abruptly ended trade negotiations with Canada after Ontario’s government ran an anti-tariff television ad in the United States that featured former president Ronald Reagan criticizing tariffs.

Trump reportedly grew angry after seeing the ad during Game 1 of the World Series between the Toronto Blue Jays and Los Angeles Dodgers, calling it “crooked” and accusing Canada of trying to influence the U.S. Supreme Court’s upcoming tariff case. The Ontario campaign, costing $75 million, aired across major U.S. networks and included footage of Reagan warning that tariffs hurt economies.