On July 20, 2026, Trump imposed 50 percent tariffs on most Canadian goods, from cars and cheese to hockey sticks and cement, declaring that Canada discriminates against American autos, alcohol, and dairy. The White House cited Canadian rules limiting U.S. car and alcohol exports and cheese quotas it called more restrictive than those applied to the EU. The tariffs are to be levied under Section 338 of the Tariff Act of 1930, an essentially dormant Depression-era provision, and take effect after 30 days.
The move reopens the trade war with America's largest trading partner months after the Supreme Court struck down Trump's IEEPA tariffs and forced $81 billion in refunds, and it arrives via yet another untested legal authority. It also punishes a boycott: Canadian provinces had pulled U.S. alcohol from their shelves in response to earlier Trump tariffs and his “51st state” taunts, and Bloomberg reported the provinces are keeping their bans in defiance of the new threat.
Prime Minister Mark Carney answered with studied calm: his government believes in “the benefits of free and fair trade,” has signed “more than 20 new economic and security partnerships” since the dispute began, and stands “ready to engage intensively.” His sharpest line located the cost: “This trade dispute has raised costs for families, particularly in the U.S.” The U.S. ambassador acknowledged Canadians “don't think very highly” of the United States now (see A Court Forces Trump to Refund $166 Billion in Unconstitutional Tariffs, but Only Businesses Get the Money, Trump Revives His '51st State' Taunt at Canada After It Slips Into a Technical Recession and House Votes 219-211 to Overturn Trump's Canada Tariffs, With Six Republicans Joining Democrats).
The tariffs took effect at midnight on August 22, 2026, after trade talks collapsed ahead of the deadline. They apply to roughly $28 billion in Canadian goods.
Prime Minister Mark Carney suspended the negotiations, citing “last-minute changes” to the U.S. terms that he described as “unfair” and “uneconomic.” He said Canada would match the United States “dollar for dollar,” with retaliatory tariffs taking effect September 8, concentrated in steel, dairy, appliances, agricultural equipment, pulp and paper, and electronics.
Asked about the state of the relationship, Carney said: “You're at war when you get attacked. We got attacked.”
On September 8, Trump answered Canada's retaliation by ordering bans on a slate of Canadian imports, from whiskies and wine to whey and larger motorcycles, which took effect September 29 (see Trump Bans Canadian Whisky, Wine, Beer and Whey Under a 1930 Law After Canada Hits Back at His Tariffs). A new round of tariff changes took effect September 15, adding 50 percent tariffs on 110 products and removing them from 10, including toilet paper; of the additions and removals, trade lawyer Wolfgang Alschner told CBC, “In dollar terms they are basically the same.” A White House official said a 50 percent tariff on cars and trucks remains on the table for January 1. Treasury Secretary Scott Bessent called Canada “a little yippy dog.”
After Trump said in Dublin that a trade deal could come “fairly soon,” Prime Minister Mark Carney said, “So, I welcome the president's comments,” adding, “There's not a pride thing.”
Update (October 1, 2026): Speaking at a White House event marking Hispanic Heritage Month on September 30, Trump said, “Canada has taken advantage of us for so many years. The worst of any country,” and added, “I love the Canadian people, but the leaders have taken advantage of our stupid leadership for many, many years. They felt emboldened.” He went on, “They act like they're totally innocent. They're not. They were very bad. But now they're being taught a little lesson.” CBC News reported that one of those lessons, as Trump described it, was his order renaming Lake Ontario on the U.S. side (see Trump Renames Lake Ontario 'Lake America' and Orders Every Federal Reference to the Old Name Deleted).
CBC added its own check of the claim: the administration's argument that Canada has been taking advantage of the United States is “not borne out by the facts,” because the modest U.S. goods deficit comes largely from discounted Alberta oil and the U.S. consistently runs a services surplus with Canada. Prime Minister Mark Carney declined to comment on Navarro's attacks and said, “Canada stands ready to negotiate in good faith.” Greer, for his part, said the door is “always open” to a deal but that “we're pretty comfortable with where we are.”