Key facts
- President Donald Trump imposed 50% tariffs on $20 billion of Canadian imports after trade talks collapsed.
- Canada's Prime Minister Mark Carney promised retaliatory measures.
- The tariffs were imposed following a national emergency declaration related to immigration and drug trafficking.
- Previous tariff escalations and exemptions created uncertainty for businesses and consumers.
- The Supreme Court ultimately struck down Trump's emergency-power tariffs.
President Donald Trump's administration has escalated a trade dispute with Canada, imposing significant tariffs after last-ditch negotiations failed. The move has fundamentally altered the long-standing alliance between the two nations and created uncertainty for businesses and consumers on both sides of the border.
Trump followed through on a threat to impose 50% U.S. tariffs on $20 billion worth of Canadian imports, which took effect after negotiations collapsed. In response, Canadian Prime Minister Mark Carney quickly promised to match the new import taxes.
The timeline of escalating tariffs began in January-March 2025, with Trump initially threatening 25% tariffs on Canadian imports, citing national emergency over undocumented immigration and drug trafficking. These were later modified with pauses and exemptions, particularly for automakers and goods complying with the USMCA trade pact. However, broader tariffs on steel and aluminum continued to pile up globally.
Further tensions arose in April-June 2025 with sweeping tariffs on auto imports and steel/aluminum, met with Canadian retaliatory measures. Legal challenges to Trump's emergency powers to impose tariffs were ongoing, with a lower court ruling against him before an appeals court temporarily halted the order.
Trade talks experienced significant volatility from July-October 2025. Trump threatened and imposed higher tariffs, while Canada adjusted its retaliatory measures to align with U.S. exemptions. Canada also outlined plans to boost exports, citing the impact of U.S. tariffs. Talks were further jeopardized when Trump withdrew from negotiations, though they were briefly revived after an ad opposing tariffs was pulled.
In November 2025, the Supreme Court heard arguments regarding Trump's use of emergency powers for tariffs. In February 2026, a 6-3 decision struck down these import taxes, including those imposed on Canada. Trump subsequently enacted a temporary 10% global levy using different legislation.
Leading up to the Supreme Court ruling, U.S.-Canada trade relations continued to sour. Canada's Prime Minister focused on strengthening ties with China, agreeing to cut tariffs on Chinese EVs, which angered Trump, who threatened further tariffs on Canadian goods.