US-Canada Trade War: A Timeline of Escalation and Collapse
A detailed timeline of the escalating US-Canada trade war, from initial tariffs to the collapse of talks in August 2026.
The trade relationship between Canada and the United States has deteriorated dramatically since President Donald Trump returned to office in January 2025, leading to a full-blown tariff war that has disrupted industries from steel to automobiles.
The conflict began on February 1, 2025, when Trump announced tariffs on Canadian goods. Canada responded with a retaliatory package worth C$155 billion. After a brief 30-day pause, the US imposed 25% tariffs on Canadian goods and 10% on energy products in March, prompting Canada to levy its own duties on a range of American consumer goods.
The dispute expanded to include steel, aluminum, and automobiles, with each side escalating tariffs in response to the other. A significant turning point came in June 2025 when Trump abruptly ended talks over Canada's digital services tax, which was later rescinded to restart negotiations.
Despite efforts to reset relations, including multiple meetings between Prime Minister Mark Carney and President Trump, the talks collapsed in October 2025 over an Ontario government advertisement featuring Ronald Reagan's anti-tariff comments. The US subsequently declined to renew the USMCA trade pact in July 2026.
The final breakdown occurred in August 2026. After failing to reach a deal, the US imposed 50% tariffs on approximately $20 billion of Canadian goods, including wine, dairy, and hockey equipment. Carney suspended negotiations and vowed dollar-for-dollar retaliation. Days later, Trump announced new 50% tariffs on Canadian vehicles and parts, set to take effect in January 2027, cementing the trade war as a defining feature of the bilateral relationship.