Canada ended trade negotiations after rejecting United States demands it considered incompatible with national sovereignty. Washington then imposed 50% duties on roughly $20 billion of Canadian goods, sharply escalating the dispute.
Prime Minister Mark Carney announced dollar-for-dollar countermeasures beginning September 8. The American proposals sought limits on Canada's ability to make trade agreements, prompting British Columbia Premier David Eby to compare them with economic absorption as a 51st state.
Canada sends nearly three-quarters of its exports to the United States, whose economy is about 10 times larger. Retaliation may increase consumer costs and reduce choice, but Ottawa argues that accepting coercive terms would carry a deeper long-term price.
United States Trade Representative Jamieson Greer disputed Canada's description of the breakdown and said more measures remained possible. Carney has urged middle powers to cooperate against coercion amid repeated White House claims that Canada depends on its southern neighbor.
The confrontation has fueled public anger, campaigns to buy Canadian products and jeering of the American anthem at sporting events. Provincial leaders are pressing Ottawa to defend market access while helping industries and workers exposed to the new tariff wall.
