Mexico has been more accommodating than Canada, people familiar with both countries' strategies said. Carney on Tuesday suggested Canadian provinces wait to put U.S. alcohol back on shelves until a broader trade agreement is reached.
Mexican President Claudia Sheinbaum has made concessions that she can frame as advancing Mexico's priorities, including tighter border security, reduced fentanyl trafficking and greater scrutiny of Chinese investment.
Carney faces a different calculus. He won the election last year promising to stand up to Trump.
"She has more degrees of freedom to operate than Prime Minister Carney does," Baker said of Sheinbaum.
Canadian officials dispute the idea that Canada is behind.
Gabriel Brunet, spokesperson for LeBlanc, said Canada is ready to expedite talks on the trade pact.
"To that end, Canada has put forward proposals that are fair, balanced, and good for the broader North American economy,” he added.
Mexico's Economy Ministry declined to comment. The USTR did not respond to a request for comment.
The core risk for Canada and Mexico is that bilateral talks could become the blueprint that one country must either accept or challenge and delay a trilateral deal.
Neither government is expected to ask the other to hold back from reaching an advantageous bilateral deal.
Mexico "will do what's best for Mexico," but it also wants to keep the USMCA trilateral and would resist proposals that explicitly broke apart the agreement, Baker said.
Carney has also sought to improve relations with Mexico.
The Mexican official said attacking the trade pact could remain politically useful to Trump among voters who blame trade agreements for manufacturing job losses, ahead of U.S. midterm elections in November.
Canadian negotiators must use the 30-day window before the new tariffs take effect to make rapid progress, said Matthew Holmes, executive vice president at the Canadian Chamber of Commerce, a lobby group that advises the government on U.S. trade relations.
Canada has signaled it will not accept unfavorable terms merely to close the talks quickly — and the 10-year review timeframe could allow Carney to negotiate with a different U.S. president.
"What I've heard from the prime minister and other members of the negotiation team is, 'We want a good deal for Canada, not a fast deal for Canada'," Holmes said.