The US–Canada rupture
The July CUSMA review has happened. The deal stays alive to 2036, on annual reviews. In August a fifty-percent duty punched through the exemption — and the decade-long Canadian gap still predates the tariffs.
Mark Carney, sworn in March 14, 2025, calls the conflict a rupture in the rules-based order — not a transition. By April 19, 2026 he said Canada’s close US trade ties are “weaknesses that must be corrected” and that US tariffs sit at “levels last seen during the Great Depression.” The damage is asymmetric. US 2026 GDP growth forecasts cluster around 2.2–2.4 percent. Canada’s sits near 1.3–1.4 percent with 6.7 percent unemployment. America absorbs the shock diffusely; Canada absorbs it by sector and province.
The tariff timeline runs hot. February 1, 2025: IEEPA tariffs of 25 percent on most Canadian goods, 10 percent on energy and potash. March reprieves for CUSMA-compliant goods — about 38 percent of Canadian exports. Steel and aluminum doubled to 50 percent by June. Autos at 25 percent from April. October brought another 10 percent after an Ontario ad campaign. January 16, 2026: Canada announced a sector-specific China deal; Trump threatened 100 percent tariffs on all Canadian goods January 24. February 20, 2026: the Supreme Court, in Learning Resources and V.O.S. Selections, held that IEEPA does not authorize tariffs. Section 232 and 301 were left standing. Trump replaced the struck duties with a 10 percent Section 122 universal tariff on roughly $1.2 trillion of imports, expiring after 150 days.
2026 growth forecasts
Multiple forecasters, April 2026 autoresearch pass. Asymmetric shock, not symmetric pain.
The review happened. The exemption did not hold.
About 90 percent of Canadian exports had been flowing tariff-free because they were CUSMA-compliant. The Spring Economic Update still claims the agreement protects about 85 percent of goods exports from “recent U.S. measures.” That shield is load-bearing. It is no longer a July cliff.
On July 1 the joint review took place. USTR declined to renew CUSMA “in its current form.” Canada’s Dominic LeBlanc and Mexico had wanted renewal. The agreement was not torn up. It remains in force to July 1, 2036, and shifts to annual reviews under Article 34.7(4). The form question — renegotiation or rubber stamp — got a third answer: neither clean renewal nor walk-away. How punitive those annual reviews become is still open.
Then the exemption story took a hole. Talks collapsed on August 21. At 12:01 a.m. ET on August 22, Section 338 fifty-percent duties hit about $20 billion of Canadian exports — roughly 5 percent of Canada-to-US flows — regardless of CUSMA origin. Canada’s dollar-for-dollar retaliation was targeted for September 8. Who blew up the talks is not settled. Carney says last-minute uneconomic and sovereignty demands. Lutnick and USTR say Canada manufactured a dispute and declined finalized terms. The term sheets are not public. Leave both on the table.
Ontario and Quebec still face effective US export tariffs above 5–6 percent and contracting auto, steel, and aluminum. Alberta and Saskatchewan sit under 0.5 percent and benefit from oil above $95 a barrel — a federalism-stressing split orthogonal to Ottawa’s “manage the conflict” framing. Canadian merchandise exports to non-US markets rose 17 percent year-on-year through January 2026 while US-bound exports fell 10 percent. By May 2025 Canada exported more crude to China than to the US. Inbound FDI hit CA$96.8 billion in 2025, highest since 2007. Diversification is real. The United States still dominates the flows. The January China deal remains a sliver, not a substitute; the issuer text of any later FTA threat was not retrieved.
The gap that was already there
It is tempting to read the 2026 numbers as a tariff story only. The cyclical piece is real: RSM puts about a one-point growth drag on Canada from American actions, and that explains most of the step from 2025’s 1.7 percent to this year’s 1.3. The structural piece is older. Canada’s GDP per capita fell from 83.1 percent of America’s in 2014 to 71.4 percent in 2024. The productivity gap with the US has widened 26 percent since 2000. After-tax incomes over the last decade: United States plus 22 percent, Canada plus 8. Housing stress, the 2021–24 immigration surge, and that per-capita slide largely predate February 2025. Brian Lilley, on a conservative Substack, called “economic problems all stem from Donald Trump” the sweet little lie — and noted that Carney himself, in a February 2025 leadership debate, said the economy was “weak before… these threats from President Trump.” Flag the framing. The chronology is checkable.
Tariffs, annexation rhetoric, CUSMA non-renewal, and Section 338 are Trump-era facts. Overlaying a decade of made-in-Canada malaise onto that account is a different claim. The wiki keeps both.
Public opinion moved with the shocks and then stuck. Canadian Trump favorability sat at 14–22 percent across 2025 and early 2026. Angus Reid, in August, put unfavourables at 79 percent. After the walkaway, 76 percent of that sample said ending the talks was the right thing; 69 percent said Carney showed strength — including 53 percent of 2025 Conservative voters. Abacus, the same week, had 71 percent backing the suspension and only 17 percent believing CUSMA would ultimately be renewed with a close relationship. Fifty-four percent of Canadians said they follow the dispute closely. Twenty-three percent of Americans did. Boycott behavior was already running ahead of the polls: Quebec travel losses to the US estimated at $3 billion; Brown-Forman down 60 percent in Canadian sales.
America is trying to break us so they can own us… that will never, ever happen.
Mark Carney, August 22, 2026
The day the Section 338 duties landed, Carney recycled that 2025 line, listed the shifting US justifications — fentanyl, tech taxes, dairy, alcohol bans, a Reagan ad, wildfire smoke — and cast diversification as “Plan A from the start.” The official account: “While we can’t control the storm blowing in from the United States, we can chart a new course.” CBC ran the full remarks. That is a foil as well as a speech. It does not settle who walked away, and it does not make the 2014–24 gap a tariff.