Canada-U.S. Trade War Escalates as Negotiations Collapse

The United States imposed 50% tariffs on approximately $20 billion (C$28 billion) worth of Canadian goods early Saturday morning after trade negotiations between the two countries collapsed in an impasse late Friday night. Canadian Prime Minister Mark Carney announced he was suspending trade negotiations with the U.S. and directing Canadian negotiators to return to Ottawa, vowing that Canada will match the American tariffs “dollar for dollar” with retaliatory measures beginning September 8.

The tariffs, which took effect at 12:01 a.m. Eastern Time, hit about 5% of Canadian exports to the U.S., including electronics, industrial machinery, dairy products, wine, cement, clothing, fishing rods, hockey equipment, furniture, and tongue depressors. The new levies are in addition to pre-existing U.S. tariffs on Canadian steel, aluminum, autos, and lumber.

A Breakdown After Weeks of Negotiations

The collapse marks a dramatic reversal from earlier in the week, when both sides sounded optimistic about reaching a deal. President Donald Trump had postponed the original tariff deadline of Wednesday by three days, saying the two sides were close to an agreement. On Thursday, Canadian negotiator Dominic LeBlanc met with U.S. Trade Representative Jamieson Greer for over three hours and told reporters the two sides were “very close” to a deal.

But on Friday night, minutes before the deadline, Carney announced the suspension of negotiations. “In recent weeks, we made important progress toward improving Canada’s position as having the best deal in the world with the US,” Carney said in a statement. “However, that progress has not been enough to meet our objectives for Canadians.”

Carney cited “last-minute changes in the U.S. proposed terms” that were “unfair, uneconomic, and called into question the reliability of any deal.” He said the U.S. added terms that would have reduced tariff relief for Canadian-made vehicles, restricted Canada’s ability to strike trade deals with other countries, and weakened protections for language, culture, and sovereignty. “They asked too much and they offered too little,” he said.

Greer, the U.S. Trade Representative, placed the blame squarely on Canada. “Tonight, Canada declined to finalise the trade deal under the terms agreed earlier this week,” Greer said in a statement. “Despite the US offer to Canada to receive the best treatment of any major exporter to our market, new demands and walkbacks of other commitments by Canada have upended the careful balance reached in the past days.”

Greer said there are no new talks planned with the Canadians, telling Fox News that “we’ve said enough, and so we’ve taken countermeasures. Our interest is in protecting American workers and protecting American supply chains.”

A Depression-Era Law Revived

The new tariffs were imposed under Section 338 of the Tariff Act of 1930, a Depression-era law that has never been used before to impose tariffs. The law allows the president to impose tariffs of up to 50% on goods from countries found to be discriminating against U.S. commerce, with no investigation required and no limit on duration. The administration turned to this legal mechanism after the Supreme Court struck down Trump’s earlier tariffs imposed under the International Emergency Economic Powers Act in February 2026.

The collapse also calls into question the future of the United States-Mexico-Canada Agreement (USMCA), which was not renewed in July. The U.S. has begun formal talks with Mexico but not with Canada, and escalating trade conflict casts doubt on whether those negotiations will proceed.

Economic Fallout and Job Losses

The economic stakes are significant. The two countries sold each other $880 billion worth of goods and services last year, and Canada sends approximately 70-72% of its exports to the U.S. Nearly 330,000 people and $2 billion worth of goods cross the border daily.

Calgary-based economist Trevor Tombe estimates Canada could lose nearly 90,000 jobs as a result of the new tariffs, with roughly 36,000 losses projected in Ontario, 18,000 in Quebec, 11,000 in British Columbia, and 9,000 in Alberta. Financial analysts project the new tariffs could reduce Canada’s GDP by 0.3% to 0.6%.

“Tariffs of 50 percent would effectively price hundreds of Canadian goods out of the US market,” said Julian Karaguesian, a lecturer and trade expert at McGill University, speaking to Al Jazeera.

Candace Laing, president and CEO of the Canadian Chamber of Commerce, called the tariffs “a body blow to North American competitiveness in this self-defeating trade saga.” She warned that “Americans will see their costs go up, and Canadians will see customers, investment and small businesses disappear.”

Provincial and Public Support for Retaliation

Carney’s decision to walk away has drawn support from provincial leaders across Canada. Ontario Premier Doug Ford said the prime minister has his “full support for a strong response - tariff for tariff, dollar for dollar,” adding that “everything needs to be on the table.” British Columbia Premier David Eby said “our politeness should never be mistaken for weakness,” while Manitoba Premier Wab Kinew argued Canada has the upper hand: “They’re coming to us for a deal and so I think we should fight.”

Alberta Premier Danielle Smith took a more conciliatory tone, urging the federal government to “restart negotiations as soon as possible.”

Canadian public opinion appears to back Carney’s hard line. A Leger Opinion poll showed 56% of Canadians do not want Carney to make any further concessions, and a petition to expel U.S. Ambassador Pete Hoekstra has collected nearly 248,000 signatures since July 21.

A Relationship Transformed

The trade war, which began in February 2025 when Trump imposed near-universal tariffs on Canadian and Mexican goods, has fundamentally altered the relationship between two of the world’s closest allies. Trump has made repeated calls for Canada to be annexed as the “51st state,” saying he could use “economic force” to bring about Canadian annexation.

Carney acknowledged this shift in his statement: “We have recognized from the beginning that America has changed, and that we will not return to our old relationship.” He added, “Canada has what the world wants. And we will not allow any nation to determine our future.”

Barry Appleton, senior fellow at the Center for International Law at New York Law School, noted the difficulty of de-escalation now. “Canada told the Americans in advance that if these tariffs landed, it would stop negotiating and retaliate,” he told AP. “The American trade representative said publicly he would not tolerate retaliation. Both sides have now committed themselves in public, which is how escalation stops being a choice.”

What’s Next

Canada’s retaliatory tariffs, targeting steel, dairy, appliances, agricultural equipment, pulp and paper, and electronics, are scheduled to take effect on September 8, the Tuesday after Labour Day. Carney said the government will introduce additional measures to support Canadian workers and businesses in the coming days.

Ryan Majerus, a partner at King and Spalding and former U.S. trade official, said both sides will face “immense pressure in the coming days to still find an off-ramp. But if Canada has agreed to also impose tariffs, the off-ramp may be even harder to find.”

With no further talks planned and both sides committed to retaliation, the trade war between the United States and Canada appears set to deepen in the weeks ahead. The BBC reports that the breakdown marks a significant shift in the U.S.-Canada relationship, one that will be a major test for Carney’s premiership and for the future of North American economic integration.