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CUSMA / USMCA

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CUSMA / USMCA

One-line summary: The Canada-United States-Mexico Agreement (CUSMA / USMCA), the 2020 NAFTA successor; USTR declined to renew “in its current form” at the July 1, 2026 joint review. Agreement remains in force to July 1, 2036 with annual reviews under Art. 34.7(4). August 2026 Section 338 50% duties apply regardless of CUSMA origin.

What it is

CUSMA/USMCA replaced NAFTA in July 2020 as the trade agreement governing North American commerce. In the 2025–2026 trade war, CUSMA-compliance has become the primary tariff exemption mechanism: roughly 90% of Canadian exports to the US remain tariff-free because they satisfy CUSMA rules-of-origin and labor requirements (2026-04-21-autoresearch-canada-us-tensions-economy-2026).

Why it matters to politics thread

CUSMA is the load-bearing structural fact behind every claim that the trade war's macro damage is "manageable." Without CUSMA exemptions, tariff coverage of Canadian exports would jump from ~10% to nearly 100%. The July 1, 2026 joint review has now happened: USTR declined to renew “in its current form”; the deal was not torn up — it stays in force to 2036 — but the exemption story is weaker after Section 338 (Aug 22, 2026) hit a slice of exports regardless of origin.

Key facts

  • In force since: July 2020.
  • 2025–2026 role: primary exemption mechanism. CUSMA-compliant goods exempted from:
    • The original IEEPA-based 25% tariffs (March 2025).
    • The IEEPA-replacement 10% Section 122 universal tariff after the SCOTUS ruling (February 2026).
    • The 35% non-USMCA-compliant IEEPA tariff (August 2025, before SCOTUS struck IEEPA down).
  • Sector carve-outs that don't get CUSMA protection: Section 232 tariffs on steel (50%), aluminum (50%), copper, autos (25%), lumber (10–50% stacking) are imposed under separate authority and apply even to CUSMA-compliant goods.
  • Coverage: ~90% of Canadian exports to the US currently flow tariff-free via CUSMA (canada-vs-us-economic-divergence-2026).
  • Joint review (July 1, 2026 — occurred). From 2026-09-04-why-canada-blames-trump-grievance-foil-and-pre-existing-gaps citing Cassels: USTR declined to renew “in its current form”; agreement remains in force to July 1, 2036 but shifts to annual reviews under Art. 34.7(4). Canada (LeBlanc) and Mexico sought renewal. Prior grain on this page (“failure to renew triggers a 16-year sunset clock”) is the structural backdrop that produced the 2036 horizon — do not treat as a fresh invented date.
  • Section 338 punch-through (Aug 22, 2026): 50% duties on ~US$20B Canadian exports (~5% of Canada→US) apply regardless of CUSMA origin (Gowling WLG). First clear hole in the “CUSMA-compliant = exempt” story for this slice.
  • Public expectation (Abacus via CityNews, Aug 21–26, 2026): only 17% believe CUSMA is ultimately renewed with a close relationship. See canadian-anti-trump-sentiment.
  • Budget SEU 2026 (official): claims CUSMA still protects ~85% of goods exports from “recent U.S. measures” — adjacent to this page’s April ~90% tariff-free grain; different metric, not silently reconciled.

Strengths

  • Has held through escalating tariff conflict — the agreement itself wasn't torn up, only sector-specific rules layered on top.
  • Provides legal cover for ~90% of bilateral trade flows, dramatically cushioning macro impact.

Weaknesses

  • Section 232 / Section 122 / IEEPA workarounds let the US impose tariffs despite CUSMA on key sectors — the agreement doesn't actually constrain American action, it just shapes which goods get hit.
  • The July 2026 review was a structural cliff; the outcome (non-renewal in current form + annual reviews) keeps leverage live without an immediate 2026 sunset.
  • Section 338 shows the agreement does not constrain US action even on CUSMA-origin goods for that instrument.
  • Was negotiated under Trump's first term; both sides have shifted positions significantly since 2020.

Open questions

  • Will the July 2026 review be substantive (renegotiation of terms) or procedural (renewal-as-is)? Form answer: neither clean renewal nor walk-away — non-renewal in current form, in force to 2036, annual reviews. Remaining: how punitive the annual reviews become, and whether Section 338 is a one-off or the template.
  • If the US walks away from CUSMA at the review, what's Canada's fallback? Partial: the US did not walk away from the agreement’s legal life; it declined current-form renewal and layered Section 338.
  • Does the SCOTUS ruling on IEEPA (Feb 20, 2026) make CUSMA more durable (since Trump can't easily route around it) or less durable (since Trump may push harder at the review to get tariff authority through trade-deal terms instead)?

Sources

Related

Referenced by
Concepts
Canada vs US Economic Divergence (2026)Canada-China Trade Deal (January 2026)Canadian Anti-Trump Sentiment (2025-2026)Trump Derangement Syndrome (TDS)US-Canada Trade War (2025-2026)
Entities
Donald TrumpMark Carney