(Bloomberg) — Prime Minister Mark Carney said Canada is prepared to resume trade talks “when the Americans are ready,” hours after US President Donald Trump halted negotiations between the two countries.

“We can’t control the trade policy of the United States,” Carney said Friday before boarding a government plane for a nine-day trip to Asia. “We recognize that that policy has fundamentally changed from the policy in the 1980s, 1990s, 2000s.”

US and Canadian negotiators had been making headway in talks about the steel, aluminum and energy sectors, Carney said. “We stand ready to pick up on that progress and build on that progress when the Americans are ready to have those discussions.”

The prime minister took no questions from reporters.

Trump said on his Truth Social platform late Thursday that he was terminating all negotiations with Canada over a televised ad campaign funded by the province of Ontario. The ad uses excerpts from a 1987 address by former President Ronald Reagan defending the principles of free trade and slamming tariffs as an outdated idea. Trump called the ad “FAKE.” The clips used in it are real.

Ontario Premier Doug Ford appeared to stand by the ad on Friday morning. “Canada and the United States are friends, neighbors and allies,” Ford said in a social media post. “President Ronald Reagan knew that we are stronger together. God bless Canada and God bless the United States.”

Top White House adviser Kevin Hassett expressed a different view of the talks. “The fact is that the negotiations with the Canadians have not been very collegial. They’ve not been going well,” Hassett said on Fox News. “I think the president’s very frustrated.”

Canada’s economy has been badly damaged by Trump’s tariffs, as about three-quarters of its exported goods went to the US last year. Ontario, which has about 16 million people, has been at the center of the trade war because of its steel and automotive industries, two sectors Trump has hit with tariffs.

Trump and Carney are likely to see each other next week, as both will be attending the ASEAN and APEC summits in Malaysia and South Korea, respectively.

—With assistance from Catherine Lucey and Mario Baker Ramirez.