Robb Kerr, acting Head of Mission for the Consulate General of Canada in Seattle, told KIRO 7, "I think at this point, we're optimistic".
"There's a lot of documents and a lot of texts to dig into in terms of what has been worked on by Mexico and the United States", Trudeau said in Montreal-area Longueuil. US and Mexican officials are reportedly hoping that the progress they've made will entice Canada, America's No. 2 trade partner, to rejoin the talks, Burrell reported.
Trump's trade war with China caused American soybean prices to crash after China imposed a 20 percent tariff on the crop.
Herman Lawrence, a senior fellow at the CD Howe Institute in Toronto who has extensive experience in US-Canada trade relations, says Canada has been "badly treated" by this divide-and-conquer approach.
Despite the apparent breakthrough on those subjects, a deal with Canada is far from certain.
One sticking point for Canada is the US effort to dump the Chapter 19 dispute resolution mechanism that hinders the United States from pursuing anti-dumping and anti-subsidy cases.
"Canada, United States and Mexico represent one body with three heads", said Alfredo Duarte, co-founder and president of Dallas-based Taxco Produce Inc., which imports food from Mexico.
Most Mexican auto exports are in a position to comply with the new limits, the country's economy minister said.
Although much could change in negotiating the final language and Canada's participation, these compromises would represent significant victories for Trump.
"This wasn't created to put pressure on anybody", a senior administration official said, before later adding that the USA planned to submit its NAFTA renegotiation plans to Congress by the end of the week with or without Canada's agreement.
Trump said Canada could become part of a three-nation deal if they negotiate "fairly", while Mexican officials said they look forward to seeing Canada join the agreement.
But getting his way would not be that simple, Mr Lawrence says.
The third outcome is that Trump "goes completely bonkers and hostile and [introduces] auto tariffs, rips up NAFTA and does all the things he's been threatening", Heyman said.
"I'm hopeful we can see that same approach with Canada and make peace here".
"I think it will be extremely hard", he adds.
The pact also requires greater use of U.S. and Mexican steel, aluminum, glass and plastics.
"We could have a separate deal, or we could put it into this deal". "It's a big day for our country", Trump told reporters in the Oval Office, from where he held a televised phone call with his Mexican counterpart, Enrique Pena Nieto. Trump is expected to send formal notice to Congress by the end of the week.
The White House said Trump will sign the deal in 90 days.