Although issues related to autos, such as the US push to boost North American content in vehicles, have been a major part of the negotiations, other issues, particularly a desire for more USA access to Canada's dairy market and Canadian insistence on maintaining NAFTA's dispute resolution system, are believed to be some of the major remaining sticking points.
But a leader of this country's main milk-producing lobby group said Monday his industry has given enough in previous trade deals and will not tolerate more concessions.
USA officials have said time is running out to agree on a text that can be signed by American, Canadian and Mexican leaders by November 30, before the current Mexican government leaves office.
As foreboding skies belied national worry over a new threat, a monstrous hurricane menacing the US east coast, Foreign Affairs Minister Chrystia Freeland cited the memory of 9/11 as evidence of deep and friendly ties that have long bound the two countries together.
Trump almost tore up the NAFTA pact past year after visiting farmers in Wisconsin, a major USA dairy producer that Washington says has been hurt by Canadian protectionism.
Freeland will head back to Canada for government business and to report to Canadian Prime Minister Justin Trudeau what transpired during the day's talks and where the negotiations stand.
Canada's Foreign Minister Chrystia Freeland will again meet with US Trade Representative Robert Lighthizer on the rewrite of the 25-year-old trade deal, Freeland's spokesman Adam Austen told AFP. "There are nearly two dozen chapters closed" in the NAFTA deal including reducing red tape on cross-border trade, he said on Monday. Under U.S. law, Trump must wait 90 days before signing the pact.
"There is not going to be a deal - period - unless there is a compromise in that area because that is what he campaigned on and it's stuck to him and he's stuck with it", Mulroney said.
The director of public Affairs of Teamsters Canada, Christopher Monette, who attended behind-the-scenes to the most recent negotiations in Washington, believes that the administration, Trump would not touch the system of supply management, particularly as it relates to the dairy industry.
A Canadian source with knowledge of the NAFTA discussions said an agreement is within reach - but they stressed that getting there will require flexibility from all sides.
"Our farmers don't have access to the Canadian markets the way that they have access to us", Perdue said in an interview that aired Sunday on C-SPAN.
Canadian Foreign Minister Chrystia Freeland takes part in a news conference at the Embassy of Canada in Washington, U.S., August 31, 2018.
Freeland and Lighthizer left the bargaining table Friday without a deal following two weeks of negotiations. "That's not who we are", Craft said in prepared remarks.
"We're just going to stay working constructively to get to that win, win, win that we know is there".
Trump is threatening to move ahead on a deal without Canada.