WASHINGTON (AP) — President Donald Trump announced he’s ending “all trade negotiations” with Canada because of a television ad sponsored by one of its provinces that used the words of former President Ronald Reagan to criticize U.S. tariffs — prompting the province’s leader to later pull the ad.

The post on Trump’s social media site Thursday night ratcheted up tensions with the U.S.’s northern neighbor after Canadian Prime Minister Mark Carney said he plans to double his country’s exports to countries outside the U.S. because of the threat posed by Trump’s tariffs. White House officials said Trump’s reaction was a culmination of the administration’s long, pent-up frustration about Canada’s strategy in trade talks.

Later Friday, Ontario Premier Doug Ford, whose province had sponsored the ad, said it would be taken down.

Ford said after talking with Prime Minister Mark Carney he’s decided to pause the advertising campaign effective Monday so that trade talks can resume. Ford said they’ve achieved their goal, having reached U.S. audiences at the highest levels.

“Our intention was always to initiate a conversation about the kind of economy that Americans want to build and the impact of tariffs on workers and businesses,” Ford said. “We’ve achieved our goal, having reached U.S. audiences at the highest levels.”

The U.S. president alleged the ad misrepresented the position of Reagan, a two-term president who remains a beloved figure in the Republican Party, and was aimed at influencing the U.S. Supreme Court ahead of a hearing scheduled for next month that could decide whether Trump has the power to impose his sweeping tariffs, a key part of his economic strategy. Trump is so invested in the case that he has said he’d like to attend oral arguments.

“CANADA CHEATED AND GOT CAUGHT!!!” Trump wrote on his social media site Friday morning. “They fraudulently took a big buy ad saying that Ronald Reagan did not like Tariffs, when actually he LOVED TARIFFS FOR OUR COUNTRY, AND ITS NATIONAL SECURITY. Canada is trying to illegally influence the United States Supreme Court in one of the most important rulings in the history of our Country.”

The ad was paid for by Ontario’s government, not the Canadian federal government. Ford, the premier, didn’t initially back down, posting Friday that Canada and the U.S. are allies “and Reagan knew that both are stronger together.” Ford then provided a link to a Reagan speech where the late president voices opposition to tariffs.