Canada‑US trade war further ruptures once‑close alliance

WASHINGTON, 23 AUGUST 2026 —

Canada and the United States ended eight days of emergency trade talks on Friday with no agreement, prompting Washington to impose 50% tariffs on about C$20 billion of Canadian goods and Ottawa to vow dollar-for-dollar retaliation starting September 8.

Prime Minister Mark Carney said the collapse marked the end of the pre-2025 Canada-US relationship. “America has changed,” he told reporters in Ottawa on Saturday. “We will not return to our old relationship.”

The United States opened fire first. At 12:01 a.m. Saturday, the U.S. Treasury began levying the 50% tariffs on Canadian steel, dairy, appliances, agricultural equipment, pulp and paper and electronics. Carney said Canada would retaliate on September 8 across the same sectors.

Carney had warned at the World Economic Forum in Davos last January that the world was entering “a rupture, not a transition.” He told reporters on Saturday the warning had come true: the U.S. had weaponised economic integration. “Its signature was written in pencil,” he said.

Daniel Béland, political science professor at McGill University, said the failure of talks signalled “the beginning of a full-scale trade war,” though he cautioned the situation could change quickly.

Canada ships 99% of U.S. natural gas imports, 85% of U.S. electricity imports and 60% of U.S. crude oil imports. Washington has concentrated pressure on autos, steel and aluminium—sectors that fuel Canadian resentment. Trump has also repeatedly raised the prospect of making Canada the 51st U.S. state.

Public anger is hardening. Canadian travel to the U.S. remains 29% lower by car and 27% lower by air in July compared with July 2024, Statistics Canada reported.

Provincial leaders lined up behind Carney. Saskatchewan Premier Scott Moe said “the old status quo is not possible.” Ontario Premier Doug Ford praised Carney for rejecting what he called a bad deal for auto, steel and manufacturing. “Trump is not to be trusted whatsoever,” Ford said.

Former Alberta Premier Jason Kenney said Canada would not “cravenly surrender in the face of constant economic and political aggression.” Lana Payne, national president of Unifor, Canada’s largest private-sector union, accused the U.S. administration of trying to “destroy the industrial economy of Canada” with strategically targeted tariffs.

Canada’s exposure remains asymmetrical: roughly 73% of its goods exports go to the U.S., while the U.S. economy is ten times larger. Royal Bank of Canada economists estimate the tariffs directly affect about 0.4% of Canada’s GDP because they cover only 5% of Canadian exports to the U.S. The damage could spread if retaliation widens, more sectors are hit or investment slows and supply chains fray.

Carney acknowledged the cost. “Our measures will raise costs and reduce choice for Canadians,” he said. He promised additional assistance for businesses and workers.

Goldy Hyder, president and CEO of the Business Council of Canada, said companies still see the U.S. as Canada’s most important trading partner but increasingly believe the shift will outlast Trump. “There is a new trade and investment model,” Hyder said, “one that could well be kept in place by future U.S. administrations whether Democrat or Republican.”

Carney is pushing to diversify. Over the past year, Ottawa has signed more than 20 trade and security agreements across five continents, aiming to attract C$1 trillion in non-U.S. investment by 2030 and double non-U.S. investment over the next decade.

The breakdown adds urgency to infrastructure moves such as an Alberta-Ottawa plan for a new Pacific Coast oil pipeline to give Canadian crude greater access to Asian markets.

Béland said the deeper change may be lasting. “The idea that things will return to normal once Donald Trump leaves the White House is probably just wishful thinking,” he said.

Related: Washington