MEXICO CITY—For much of Donald Trump’s second US presidential term, governments have faced the same question: How do they negotiate with a US leader who uses economic pressure as an instrument for broader political demands? Canada has now offered one answer. It said no.
On August 21, Canadian Prime Minister Mark Carney walked away from trade negotiations with Washington after concluding that the United States was demanding too much in exchange for too little. “We cannot accept what they have offered, and we will not give what they have asked,” Carney explained the next day. New US tariffs followed, and Canada decided to retaliate dollar for dollar.
The significance goes well beyond trade. China and Brazil have resisted Trump’s economic pressure, but Canada belongs to a different category. It is a longstanding US ally and one of its closest economic partners.
This is not a trade war with an adversary. It is something far more unusual: A dispute between two countries whose economies have been deeply intertwined for decades.
Mexico is watching closely, not because Canada’s path necessarily serves Mexican interests, but because what happened to Ottawa offers a preview of the political environment in which Mexico City will negotiate with Washington.
Canada said no. Mexico is taking notes.
Curiously, the rupture has received relatively little attention in Mexico. David Agren, a Canadian journalist based in Mexico City, noted in The Globe and Mail that the story had been overshadowed by domestic political drama.
Publicly, Mexican President Claudia Sheinbaum has downplayed the rupture, describing it as a “disagreement” and expressing hope that her neighbors to the north will eventually reach an agreement. She has been careful not to make Canada’s dispute her own or to give Washington the impression that Mexico and Canada are forming a common front against Trump. But aspects of the failed negotiations should draw attention in Mexico City.
Of particular concern were the automotive discussions, especially the treatment of rules of origin. One of the issues that helped derail the talks was reportedly Washington’s refusal to extend tariff relief to medium- and heavy-duty trucks. A similar approach toward Mexico would hit an auto industry that has expanded under decades of North American integration.
There is also a political dimension. Carney has the political space at home to draw a hard line. Sheinbaum probably does, too. But her avoidance of public confrontation appears to reflect a deliberate strategy shaped by the broader stakes Mexico has in its relationship with Washington, where trade negotiations unfold alongside cooperation and tensions over migration and security.
Mexico and Canada each share a border with the United States and belong to the United States-Mexico-Canada Agreement (USMCA). Both send most of their exports to the US market, and both have deeply integrated manufacturing sectors built around North American co-production. But the composition of their economic relationships with the United States is different.
Canada combines manufacturing integration—particularly in automobiles—with major exports of energy, natural resources, and strategic commodities. Mexico’s export relationship with the United States is much more concentrated in manufacturing and co-production. Manufactured goods account for roughly 92 percent of Mexican exports to the United States, much of it tied to integrated North American production chains.
Their negotiating positions are therefore different. Carney has concluded that Canadian interests are now better served by drawing a line. Mexico is following a different path.
Four lessons for Mexico
Whatever their respective strategies, the consequences of the rupture will not be confined to Canada and the United States. An eye for an eye, a tooth for a tooth—and now, a dollar for a dollar—may be an effective political response to pressure, but for economies this deeply integrated, retaliation does not stop at the border. It will impose costs on both countries and, if the confrontation persists, on North America as a whole.
Mexico and Canada share an interest in preserving a strong North American economic architecture. But Canada’s experience shows how difficult that will be when Washington may not see it the same way.
For Mexico, the episode offers four lessons.
First, this is a political negotiation, not merely a technical one. Washington has shown that access to the US market can be used as leverage on issues extending well beyond trade. Mexico therefore needs to approach the USMCA process politically.
China could prove one such political flashpoint. One issue that contributed to the collapse of the US–Canada talks was reportedly Washington’s demand for restrictions on Canada’s ability to strike trade agreements with other countries—a red line for Carney, who framed it as a matter of sovereignty. The USMCA already contains a so-called “poison pill” allowing the other members to withdraw if one party signs a free-trade agreement with a “non-market economy,” language widely understood as aimed at China. Mexico should expect Washington to seek even stronger guardrails in the next USMCA review, particularly around Chinese investment in strategic sectors.
Mexico may already be moving in that direction. On August 31, Sheinbaum’s government sent the Senate a proposed reform that would subject certain foreign acquisitions in energy, artificial intelligence, semiconductors, cybersecurity, and data to national-security reviews. The move may help Mexico demonstrate that it is taking US concerns over Chinese investment seriously without formally surrendering its ability to conduct an independent trade policy.
Second, Mexico needs to recognize the double-edged nature of its economic integration with the United States. For decades, that integration has been one of Mexico’s greatest economic advantages, attracting investment and turning the country into an essential part of North American manufacturing. But interdependence cuts both ways: tariffs can expose Mexico to pressure, while US reliance on Mexican inputs and production also gives Mexico leverage.
Third, nothing is settled until it is settled. Only days before the rupture, Canada and the United States appeared to be making progress on some of their most difficult issues. Sheinbaum spoke with Carney on the Thursday before the talks dissolved, and she later recounted that during that phone call “it seemed like everything was going to be agreed upon.” Then, last-minute demands helped derail the negotiations. As Mexicans say, “del plato a la boca se cae la sopa.” Mexico should expect uncertainty even when an agreement appears close.
Fourth, Mexico has more leverage inside a trilateral framework than alone at the table with the United States. Mexico and Canada do not need identical positions, nor does Mexico need to join Ottawa in every dispute with Washington. Preserving trilateralism is in Mexico’s own interest.
The challenge is that Washington increasingly appears comfortable negotiating separately with its two neighbors. Mexico must therefore prepare for that possibility without encouraging it. Mexico should have a bilateral strategy ready. The strategy should clarify what Mexico cannot concede, where it has room to negotiate, and which US industries and regions have the greatest stake in preserving cross-border production.
For Mexico, the US–Canada rupture is neither a model to emulate nor a warning against confronting Trump. It is a window into the negotiation ahead.