As US-Canada tensions flare, who’s calling the shots in Trump’s trade team?

US Trade Representative Jamieson Greer, a 46‑year‑old former military lawyer who once read Victor Hugo’s Les Misérables in French while serving in Iraq, found himself at the center of a rapidly deteriorating trade dispute with Canada after a tentative agreement collapsed at the last minute. The breakdown, which threatens to spiral into a broader trade war between the two tightly linked economies, was sparked by a Canadian accusation that U.S. negotiators were pressing to weaken legal protections for the French language—a core element of Quebec’s cultural policy that mandates streaming and online video services to invest in Canadian content and promote French. Prime Minister Mark Carney declared the United States had “come under attack,” labeling the language‑related objections a “deal‑breaker” and “threats to French language and culture.” Greer, who is fluent in French and has personal ties to the language through his family, dismissed the claim as a “funny, fake story,” emphasizing his respect for Québécois culture while criticizing Canada’s requirement that American tech firms divert earnings to domestic competitors. By Thursday he was offering a softer tone, telling CBC that the Trump administration “recognizes the importance and sensitivity of the French language in Canada” and “actually champion[s] the use of French,” only to see the gesture undercut hours later when President Trump signed an executive order renaming Lake Ontario to “Lake America,” a symbolic move that highlighted the limited maneuverability of officials trying to temper the president’s aggressive trade posture.

The dispute’s deeper roots lie in a clash of priorities within the U.S. negotiating team, particularly between Greer and Commerce Secretary Howard Lutnick, who objected to the scale of tariff reductions on Canadian steel, aluminium and automobiles—sectors the president has classified as matters of national security under the 1962 Trade Expansion Act. Lutnick’s resistance to the proposed concessions, which he viewed as his jurisdiction, created a fissure that Canadian officials interpreted as the United States moving the goalposts late in the talks. While the White House denies any division between Greer and Lutnick, analysts such as William Reinsch of the Center for Strategic and International Studies note that Lutnick “viewed all this as his turf,” and Greer appeared willing to go farther than his commerce counterpart. Former trade negotiator Wendy Cutler, who has worked under both Republican and Democratic administrations, described Greer as “extremely impressive,” level‑headed, and creative in threading the needle of Trump’s trade agenda, but acknowledged that internal tensions are not unprecedented, though they are usually managed behind the scenes.

The fallout from the failed negotiations reverberates beyond the immediate tariff impasse, signaling a potential escalation toward retaliatory measures that could disrupt supply chains and consumer prices on both sides of the border. Canadian industries reliant on U.S. markets, particularly the automotive and steel sectors, face uncertainty as the prospect of tit‑for‑tat tariffs looms, while American tech companies risk losing access to a market that accounts for a significant share of their revenue. The episode also raises broader questions about who truly steers Trump’s trade policy: Greer’s calm, diplomatic approach appears increasingly constrained by the more hard‑line stances of Lutnick and the president’s own symbolic gestures, such as the Lake Ontario renaming. As the United States and Canada navigate this diplomatic rift, the resolution—or further deterioration—will likely shape North American trade dynamics for years to come, testing the resilience of the bilateral relationship that has long underpinned the continent’s economic integration.

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