Canadian Prime Minister Mark Carney has apologised to U.S. President Donald Trump after an anti-tariff advertisement aired in Canada using a Ronald Reagan quote criticizing trade barriers.

The ad, funded by Ontario’s provincial government, featured clips from Reagan’s 1987 radio address warning that tariffs “hurt every American worker and consumer.”

The commercial sparked diplomatic tension — prompting Trump to suspend trade talks with Canada and announce plans for a 10% tariff increase on Canadian imports.

Carney, speaking at the Asia-Pacific Economic Cooperation (APEC) Summit in South Korea, said the advert was “not something I would have done” and that Trump was “offended” by it. He added that he had advised Ontario Premier Doug Ford against airing it.

Trump confirmed Carney’s apology but maintained the ad was “wrong.”

The ad reportedly triggered an angry exchange between U.S. envoy Pete Hoekstra and Ontario trade representative David Paterson, prompting Ford to call for an apology.

The U.S. currently imposes a 35% tariff on Canadian goods (with exemptions under a free trade agreement), alongside 50% tariffs on steel and aluminium and 25% on automobiles.

Trump accused Canada of trying to influence a pending U.S. Supreme Court case over the legality of his administration’s broad tariffs on Canada, Mexico, China, and others.