Trade war between Canada and US further ruptures alliance

For decades, Canada built much of its prosperity on privileged access to the United States. Now, after the collapse of trade talks, one of the world’s closest and most durable alliances has been fundamentally altered, with both countries facing the risk of a full-scale trade war. Prime Minister Mark Carney acknowledged the break after last-ditch negotiations failed, saying Canada had recognised that 'America has changed' and that the countries would 'not return to our old relationship'. The United States imposed 50% tariffs on about US$20 billion worth of Canadian goods early Saturday (local time). Carney said Canada would retaliate dollar for dollar beginning September 8, targeting sectors including steel, dairy, appliances, agricultural equipment, pulp and paper, and electronics. Carney foreshadowed the shift at the World Economic Forum in Davos in January, declaring that the world was experiencing 'a rupture, not a transition' and urging countries such as Canada to reduce their vulnerability to economic coercion by strengthening their economies at home and diversifying abroad. Prime Minister Mark Carney spoke about Canada's response to new US tariffs during a news conference on Parliament Hill in Ottawa on Saturday, August 22, 2026. He accused the US of using 'economic integration as a weapon' and said its 'signature was written in pencil'. Daniel Béland, a political science professor at McGill University in Montreal, noted that the collapse of tariff talks confirmed the perception that Canada can’t trust the Trump administration. The pressure from Republican President Donald Trump has extended beyond tariffs, questioning Canada’s economic viability and encouraging production to move from Canada to the US, angering many Canadians and fueling a sense of betrayal. Canadian travel to the US remains sharply lower than before the dispute, with July return trips down nearly 29% by car and 27% by air from July 2024. The failed negotiations underscored how far the relationship had shifted. Canada had been prepared to accept some US tariffs for market access and greater certainty, a break from decades of policy aimed at eliminating trade barriers. The collapse also puts Carney’s approach to Trump to the test. His 'elbows up' posture has kept him popular at home, and his decision to resist US pressure could resonate abroad. Provincial and conservative leaders broadly backed Carney. Saskatchewan Premier Scott Moe said 'the old status quo is not possible', while Ontario Premier Doug Ford praised Carney for rejecting what he called a bad deal for the auto, steel, and manufacturing sectors. Former Alberta Premier Jason Kenney said Canada was not 'cravenly surrendering in the face of constant economic and political aggression'. Lana Payne, national president of Unifor, accused Trump of trying to weaken Canada’s industrial base. Nearly three-quarters of Canada’s goods exports go to the United States, with the US economy roughly 10 times larger than Canada’s, limiting Ottawa’s ability to retaliate dollar for dollar without disproportionate damage. Royal Bank of Canada economists estimate the tariffs directly affect about 0.4% of Canada’s GDP because they cover only about 5% of Canadian exports to the US. The damage could grow if retaliation broadens, more sectors are targeted, or the dispute curbs investment and disrupts supply chains. Carney acknowledged the cost of retaliation, saying the Canadian measures would 'raise costs and reduce choice for Canadians'. Carney said Canada supplies 99% of US natural gas imports, 85% of its electricity imports, and 60% of its crude oil imports. Trump has focused much of his pressure on autos, steel, and aluminum, fueling resentment among Canadians who see the push as an effort to hollow out key industries. Goldy Hyder, president and CEO of the Business Council of Canada, said businesses still view the US as Canada’s most important trading partner but increasingly see the shift as lasting beyond Trump. Canada looks beyond the United States because 'things will never be the same'. The breakdown adds urgency to Carney’s push to diversify beyond the US, aiming to attract $1 trillion Canadian by 2030 and double non-US investment over the next decade. Canada has signed more than 20 trade and security agreements across five continents in the past year. In July, Ottawa and Alberta advanced plans for a new Pacific Coast oil pipeline to give Canadian crude greater access to Asian markets and reduce reliance on US buyers. Béland said the deeper change probably will persist, partly because US protectionism is likely to remain influential under future administrations. 'The idea that things will return to "normal" once Donald Trump leaves the White House is probably just wishful thinking,' he said. 'It doesn’t mean the relationship might not improve in the future, but things will never be the same.'