US-Canada Trade War Erupts Over 50% Tariffs

US imposed 50% tariffs on Canadian goods after talks collapsed; Canada vows dollar-for-dollar.

The United States imposed 50% tariffs on approximately $20 billion worth of Canadian goods early Saturday after last-ditch trade negotiations collapsed late Friday night. U.S. Trade Representative Jamieson Greer stated that Canada had declined to finalize a trade deal under terms agreed earlier in the week, saying, "Despite the U.S. offer to Canada to receive the best treatment of any major exporter to our market, new demands and walk backs of other commitments by Canada have upended the careful balance reached." Greer told Fox News that no new talks were planned with the Canadians. The tariffs went into effect at midnight, covering products including wine, dairy, cement, clothing, and hockey equipment.

The breakdown marked a dramatic reversal from just days earlier, when officials on both sides sounded optimistic that a compromise was within reach. President Donald Trump had paused the tariffs for three days, writing on social media that the two sides "have a DEAL!" Canadian minister Dominic LeBlanc told reporters late Thursday that negotiators were "very close" and continuing to make progress. Talks stretched past 10:30 p.m. ET Friday at the U.S. trade representative's office, but the two sides ultimately could not bridge their differences. DW reported that the culmination of long, tense negotiations marks a sharp reversal from the optimism expressed earlier in the week.

Prime Minister Mark Carney announced Canada would match the U.S. tariffs "dollar for dollar" to protect Canadian workers, farmers, families, and businesses. "They asked too much, and they offered too little," Carney said, calling the last-minute changes in U.S. proposed terms "unfair, uneconomic, and called into question the reliability of any deal." He suspended negotiations and directed Canada's negotiating team to return to Ottawa. The retaliatory tariffs, targeting steel, dairy, appliances, agricultural equipment, pulp and paper, and electronics, will take effect September 8. Ontario Premier Doug Ford said the prime minister had his "full support" for retaliation, while British Columbia Premier David Eby stated, "We didn't ask for this, but we'll keep fighting for as long as it takes."

President Trump struck back early Sunday on Truth Social, writing that Canada wants "the benefits of being a State, without being one." He accused Canada of charging U.S. farmers "massive amounts of Tariffs" for many years. According to Hindustan Times, this is not the first time Trump has floated the idea of Canada as the 51st U.S. state, a jibe dating back to 2025. DW reported that Trump has often said he wants tariffs on Canadian goods to encourage companies to move manufacturing back to the U.S. Carney responded that Canada understood that "America has changed" and that the two countries would "not return to their old relationship."

NBC News reports that the new tariffs were imposed under Section 338 of the Tariff Act of 1930, a Depression-era law that has never been deployed before. The law allows the White House to implement duties of up to 50% on any foreign trade partner that "discriminates" against U.S. commerce. According to NBC News, the tariffs are all but certain to be challenged in court. Greer characterized the Section 338 duties as payback for Ottawa's retaliation against prior tranches of Trump's tariffs, noting that only Canada and China have retaliated against U.S. trade measures. The tariffs are in addition to existing U.S. duties on Canadian steel, aluminum, autos, and lumber.

The economic stakes are significant for both nations. Approximately 70% of Canadian exports go to the U.S., making Ottawa potentially more vulnerable in the standoff. According to the BBC, an analysis by Calgary-based economist Trevor Tombe estimated Canada could lose 90,000 jobs if the tariffs are implemented, with financial analysts projecting a GDP reduction of 0.3% to 0.6%. CBS News reported that the two countries sold each other $880 billion worth of goods and services last year. The Canadian Chamber of Commerce called the tariffs "a body blow to North American competitiveness," while the U.S. Chamber of Commerce warned they would damage both economies and risk the 13 million American jobs tied to the North American trade pact. With no further talks planned, the next flashpoint is September 8, when Canada's retaliatory measures take effect.