What background knowledge helps explain U.S. declines to extend CUSMA trade deal with Canada, Mexico?

Several pieces of background knowledge help explain why the U.S. has been reluctant—or has outright declined—to extend the USMCA / CUSMA trade deal. The evidence points to a mix of presidential hostility, specific bargaining demands, dispute‑ridden trading relationships, and the agreement’s own built‑in safety valve.

Trump’s hard‑line opposition

President Trump said the U.S. “would do better without USMCA” and was unsure he’d renew the pact [6] [8]. That personal stance made an easy extension almost impossible from the start, because any deal needed to satisfy his demand for visible wins.

Demands for new concessions before extending

The Trump administration “is not particularly eager to extend without getting something more” [2]. It pushed for tighter rules of origin, including a proposal to require 50% U.S. content in eligible autos [1]. It also wanted stronger protections for U.S. market access, such as challenging long‑standing 2.5% tariff lines [5]. So extension became a bargaining chip rather than a routine step.

The review mechanism removes urgency

If the three countries don’t agree to extend, the USMCA automatically stays in force for another 10 years while negotiations go on [3]. Congress actually had misgivings about this mandatory review clause during the original negotiations [4]. Because the deal won’t collapse overnight, the U.S. feels little pressure to say “yes” now.

The long‑running dairy dispute with Canada

Canada keeps extremely high tariffs on dairy imports—over 200%, approaching 300% on butter—to protect its farmers [10] [11]. The USMCA preserved Canada’s supply‑management system, granting only limited tariff‑rate quotas for U.S. exporters [12]. Even those quotas were mostly handed to Canadian processors, not directly to American producers. The U.S. challenged the practice and won a formal dispute, proving Canada had breached several USMCA articles [14] [16] [17] [18]. Trump repeatedly griped about Canadian dairy protectionism at international summits [13] [15]. With that sore point still open, the U.S. is unwilling to lock in the agreement for longer.

Unilateral U.S. protectionism

In March 2025 the U.S. imposed worldwide 25% tariffs on automobiles and auto parts, hitting Canada and Mexico [9]. Actions like that sour the negotiating atmosphere and signal the U.S. is comfortable acting outside the USMCA basket, making extension harder.

Auto rules of origin and competitiveness worries

The USMCA Act (Section 202) already specifies strict rules of origin [19] and raised regional value‑content requirements for cars [20]. While those rules nudge manufacturing investment toward the U.S., they also slightly hurt the global competitiveness of U.S. automakers [21]. Biennial reports mandated by the deal keep the debate alive [22], and the U.S. now wants even tougher standards [1]—a sticking point with Canada and Mexico.

Mixed economic scorecard

U.S. trade with USMCA partners hit $1.8 trillion in 2022, but with a $184.6 billion deficit (imports > exports) [23]. That imbalance feeds arguments that the deal isn’t fair enough and should be re‑worked before extension. At the same time, the agreement supports 13 million American jobs [24] and spurred a 55% jump in investment from Canada and Mexico (to $775 billion) [25]. High compliance rates—almost 80% of Mexican and Canadian exports in 2025—show deep integration [26], giving the U.S. confidence that it can push for more without wrecking the trading relationship overnight.

Domestic voices that wanted extension (but lost out)

Agricultural groups urged Trump to extend the USMCA for another 16 years with duty‑free farm products [7]. Their position, however, did not change the administration’s broader negotiating strategy.

All of these factors together paint a picture of a U.S. side that sees extension not as a natural renewal but as an opportunity—or even a necessity—to extract further gains, while facing little downside risk if it says “no” for now.