U.S. President Donald Trump said late Thursday that he was terminating “all trade negotiations” with Canada — citing a Canadian advertising campaign targeting the White House’s tariffs that featured former President Ronald Reagan speaking critically of import duties.

In a

post on his Truth Social online platform, Trump slammed Canada’s “egregious behavior” and said the television ad was meant to “interfere with the decision of the U.S. Supreme Court, and other courts,” which are deliberating the legality of the Trump administration’s widespread tariffs on U.S. imports.