He added that the United States was more than willing to slap tariffs on Canadian auto imports, if Canada didn't acquiesce to his demands to reduce tariffs on US dairy.
"Canada will come along", Trump said, before again threatening to tax Canadian auto imports if the Trudeau government didn't come around. "We are very much looking in a positive and constructive way to getting to a renewed NAFTA that will be a trilateral agreement between Canada, Mexico and the United States".
Joseph Hinrichs, Ford's executive vice-president for global operations, said that he saw no easy resolution to the US-China trade war, and that the company was planning to launch new vehicles in China - including for its premium Lincoln brand - to halt its recent slide in that market.
Ford is looking at speeding up plans to build more cars in Chinese plants, with the growing trade war with the United States making USA exports less attractive, a senior executive has said.
The U.S. and Canada are at odds over anti-dumping dispute panels contained under Chapter 19 of the current deal, which the U.S. wants to remove and Canada wants to keep. "And frankly we're thinking about just taxing cars coming in from Canada", he said.
President Donald Trump has informed Congress he intends to sign a new deal, with or without Canada, by late November before Mexico's new president takes office.
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Canada is facing another USA deadline to make a deal: the end of the month. "And if we could do it in one deal, we'll do it as one deal - if we do it in two deals, we'll do it in two deals". "A broad range of paths are ahead of us".
Canadian officials said they do not believe Trump can rework NAFTA into a bilateral deal without the approval of Congress.
The auto industry is key to Nafta and the free trade deal is critical to the North American supply chain.
Canadian Prime Minister Justin Trudeau, who spoke at the sidelines of the event hosted by the Council on Foreign Relations in NY, had also sent mixed signals.
Negotiations for possible exemptions for Mexico and Canada from USA steel and aluminum tariffs imposed earlier this year will take place after the new Nafta deal is agreed on, Lighthizer said.
Canadian Prime Minister, Justin Trudeau, speaks during a news conference at U.N. headquarters during the General Assembly of the United Nations in Manhattan, New York, U.S., September 26, 2018. "I think our view is that now we'll turn to that as the next stage". The pair shared an awkward handshake on Tuesday, when Mr. Trudeau approached Mr. Trump before a group luncheon.