Canadian Prime Minister Mark Carney said Thursday that trade negotiations with the United States had turned “nasty” after President Donald Trump derided America’s neighbor and its leadership while threatening to expand tariffs.

Carney said Canada remained engaged in the negotiations despite Trump’s comments, describing the talks as a fight to protect Canadian workers and businesses.

“This is a tough negotiation,” Carney said in French. “You can say ‘nasty.’ But this is a question of Canadian jobs. It’s a question of the future of Canadian businesses.”

Trump criticized Canada during a speech Wednesday in Las Vegas.

“Canada’s nasty. They are. They’re nasty,” Trump said. “I love the people, but they’re nasty. Nasty leadership.”