US President Donald Trump has announced an immediate end to all trade negotiations with Canada over an advert critical of the tariffs he has imposed on the nation.

The advert, sponsored by the government of Canada’s province of Ontario, quoted Trump’s predecessor, Ronald Reagan, saying tariffs “hurt every American”.

Trump wrote on social media that the advert was “FAKE” and “egregious”, adding that trade talks were “hereby terminated”.

His administration has imposed a 35% levy on many Canadian imports, as well as individual tariffs targeting particular industries like car and steel manufacturing. Ontario has been particularly hard-hit by the measures.