Donald Trump has issued a warning to Canada after he condemned an ad by the Ontario government that used former president Ronald Reagan’s voice to criticize tariffs.

The premier of Canada’s most populous province has again complicated the country’s delicate trade negotiations with the U.S., this time with a political ad targeting Americans that has drawn the ire of U.

An ad criticizing tariffs was the latest example of Doug Ford’s disruptive role in Canada’s trade talks with the U.S.