The US/Canada trade war escalates as retaliatory tariffs from Canada spur the White House to unveil a plan to ban certain products entirely

Canadian retaliatory tariffs of up to 50% on some 700 US goods took effect on Tuesday and led to a quick response from the White House who unveiled plans hours later that included a plan to ban Canadian dairy products, most alcoholic beverages and motorcycles as relations between the US and Canada took yet another turn for the worse.

The move by Canadian Prime Minister Mark Carney solidified Canada as one of the few nations to choose confrontation in President Trump’s trade wars. Canadians say they are willing to endure economic pain to make a point.

And neither side appeared interested in stepping back Tuesday with Carney striking a defiant tone and Trump’s team quickly rolling out a series of actions in response, including the plans for a full ban on dairy products and a partial ban on alchohol products which currently have tariffs but will now be “excluded from importation into the United States” on September 29 if the stalemate between the two nations continues.

These bans will be carried out, the White House says, under Presidential Authority derived from Section 338 of the Tariff Act of 1930.

Flags of Canada and United States fly across the international border on the Gordie Howe International bridge that connects Windsor, Ontario,  Canada and Detroit, Michigan on September 6, 2026. Canada announced on August 25, 2026 counter-tariffs on US goods ranging between 15 and 50 percent, intensifying the trade war between the historically close allies. Ottawa's retaliation will take effect September 8, a timeframe earlier outlined by Prime Minister Mark Carney after US President Donald Trump's 50-percent duties came into place August 22, 2026. (Photo by JEFF KOWALSKY / AFP via Getty Images)
Flags of Canada and United States fly across the international border on the Gordie Howe International bridge on September 6. (JEFF KOWALSKY / AFP via Getty Images) · JEFF KOWALSKY via Getty Images

The new Canadian tariffs that went into effect on Tuesday were first announced in August to match an array of 50% tariffs that Trump imposed after trade talks broke down. The White House response to that response on Tuesday evening also included plans to adjust tariffs on other goods and a ban on Canadian goods in government contracts.

The Senior Trump administration official described Tuesday night’s action as a response to Canadian actions but also said that US and Canadians officials had been in touch in recent days in what were described as constructive talks even as they remain far apart.

Meanwhile, the public position from the leaders of both sides has hardened in recent days.

Carney, in a web video released on Tuesday, struck a defiant tone acknowledging that a trade war would cause economic pain in his country but promising “we will do whatever it takes for as long as it takes” to avoid what he called a bad deal with the US.

Trump for his part has mostly been lobbing insults and recently posted a map that showed Canada and Mexico as part of the United States and leveled a threat to ban sales of Canadian aircraft manufacturer Bombardier in the United States.

Canada’s new tariffs from 15 to 50%

The new measures from Canada went into effect at 12:01 a.m. ET, doubling the tariffs on American steel and aluminum products to 50%. Other tariffs range from 15% to 50% on clothing, wood products, appliances, cosmetics, farm equipment, and more.

In total, the new tariffs affect about $20 billion in US goods, or roughly 6% of what the United States sent to Canada last year.

Canadian Prime Minister Mark Carney speaks about the trade dispute with the United States at the Davie Shipyard in Levis, Quebec, Canada on August 24, 2026. The administration of US President Donald Trump warned on August 23 that Canada would be "foolish" to think it could win a trade war with the United States, predicting a "devastating" impact on its northern neighbor. Negotiations between Washington and Ottawa broke down late August 22, putting into force new 50-percent US tariffs impacting about $20 billion worth of Canadian goods, or 5.5 percent of Canadian exports to the US. Canada in retaliation said it would match US tariffs, with new levies notably targeting the US steel and dairy industries to take effect on September 8. (Photo by ANDREJ IVANOV / AFP via Getty Images)
Canadian Prime Minister Mark Carney speaks about the trade dispute with the United States at the Davie Shipyard in Levis, Quebec, Canada on Aug. 24, 2026. (ANDREJ IVANOV / AFP via Getty Images) · ANDREJ IVANOV via Getty Images

Canada announced the plan as a “dollar-for-dollar” response to Trump, but the duties are more limited than the US tariffs, which hit about $28 billion in Canadian imports, reflecting Canada’s smaller economy.

Canada had also planned additional tariffs on maritime products like lobster and fish, but those were rolled back after an outcry on both sides of the border.

Carney told reporters recently that he is in no hurry to restart talks with the US and is focused on increasing trade with other countries instead of “waiting for a call, refreshing on social media to see what’s coming across.”

Further escalation

Trump on Monday this week targeted Canada’s aerospace industry and posted “NO MORE SELLING BOMBARDIER IN THE UNITED STATES!”

Bombardier quickly responded in a statement that the company employs thousands of Americans whose jobs could be put at risk if the president follows through on the threat. Republican Sen. Jerry Moran, a Trump ally, echoed that concern, noting that Bombardier employs more than 1,000 workers in Wichita, Kan.

US President Donald Trump holds his fist up after disembarking from Air Force One upon arrival at Joint Base Andrews, Maryland on September 7, 2026. Trump is returning to the White House from his Bedminster golf club. (Photo by Jim WATSON / AFP via Getty Images)
US President Donald Trump holds his fist up after disembarking from Air Force One upon arrival at Joint Base Andrews, Maryland on September 7, 2026. (Jim WATSON / AFP via Getty Images) · JIM WATSON via Getty Images

Tuesday night’s action from the White House also included a move to shut Canadian products out of US government contracts until Canada allows what the White House describes as “full and fair reciprocity″ for American products.

Trump is also pledging further escalation that could have deeper economic ripples, most notably a threat of 50% tariffs on autos and auto parts at the end of the year. Last Friday, he went so far as to muse about ending “all trade with Canada” as he threatened embargoes on the world.

Yet the tit-for-tat actions so far have not touched some of the most sensitive areas of US/Canadian trade — most notably oil and gas, as well as Canadian potash fertilizer that US farmers rely on.

US goods exports to Canada in 2025 totaled $333.6 billion, while US imports from Canada totaled $381.9 billion, according to Trump’s trade representative.

This story has been updated with additional developments.

Ben Werschkul is a Washington correspondent for Yahoo Finance.

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