U.S. President Donald Trump has announced the immediate termination of all trade negotiations with Canada following the release of an Ontario government advertisement that used the late President Ronald Reagan’s words to criticize American tariffs.

In a late-night post on Truth Social, Trump blasted the ad mistakenly attributing it to the Canadian federal government calling it “fraudulent and fake.”

“TARIFFS ARE VERY IMPORTANT TO THE NATIONAL SECURITY, AND ECONOMY, OF THE U.S.A. Based on their egregious behavior, ALL TRADE NEGOTIATIONS WITH CANADA ARE HEREBY TERMINATED,” Trump declared.

The controversial ad, produced by Ontario Premier Doug Ford’s administration, features an excerpt from Reagan’s 1987 radio address warning against tariffs and trade wars. The clip, repurposed without permission, portrays tariffs as harmful to jobs and markets.

The Ronald Reagan Presidential Foundation & Institute condemned the ad, accusing Ontario of misrepresenting Reagan’s words.

The decision to halt talks comes just two weeks after Canadian Prime Minister Mark Carney visited Washington to discuss a potential trade deal covering steel, aluminum, and energy. According to government sources, Ottawa was informed of Trump’s decision moments before his social media post.

Trump, who had seen the ad days earlier, had initially responded calmly, even joking about it during a Republican gathering at the White House.

“I saw an ad last night from Canada. If I was Canada, I’d take that same ad also,” Trump said. “But I do believe that everybody’s too smart for that.”

Now, with trade negotiations abruptly frozen, the diplomatic fallout between the U.S. and Canada could deepen — especially as both nations navigate sensitive economic and political ties ahead of upcoming elections.