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US–Canada Trade War Timeline 2026: Tariffs, Retaliation, Import Bans
7 reports since 2026-08-23 · Updated 2026-09-23
Where It Stands
As of 2026-09-23- Talks collapsed on August 21. The US imposed tariffs of up to 50% on $20B of Canadian goods from August 22, and announced 50% tariffs on Canadian autos, parts, and steel from January 2027.
- Canada’s retaliation — up to 50% on C$27.6B of US goods — took effect September 8. The same day, Trump signed Section 338 proclamations banning Canadian dairy, alcohol, and large motorcycles outright, effective September 29.
- Trump says Canada “desperately wants a deal” that could come “very soon.” The September 29 ban date is the next deadline to watch.
Timeline
September 2026
42026-09-13
Trump Says the War Ends on Schedule. He Also Just Confirmed Iran Hit the Pipeline That Bypasses Hormuz.
Oil / Energy ↑Iran Risk ↑Canada Trade Risk ↓2026-09-09
Tariffs Weren’t Enough: Trump Bans Canadian Imports Outright, Reviving a 1930 Law Presidents Never Dared Use
Canada Trade Risk ↑Geopolitical Risk ↑Agriculture ↑2026-09-08
Trump Posted a Map Annexing Canada, Greenland, Iceland, and Mexico. Iceland — Which Has No Army — Summoned His Ambassador.
Geopolitical Risk ↑Diplomacy ↓Defense ↑2026-09-05
Cut Rates or I Halt Trade: Trump Takes His Own Trade Policy Hostage to Pressure the Fed
Equities ↓Dollar ↓Canada Trade Risk ↑
August 2026
32026-08-28
Trump Renames Lake Ontario ‘Lake America’ by Executive Order — And Threatens the Atlantic Is Next
Canada Trade Risk ↑Diplomacy ↓Geopolitical Risk ↑2026-08-24
Trump Announces 50% Tariffs on Canadian Autos, Trucks, Parts, and Steel — Effective January 2027
Auto/Manufacturing ↓US Steel ↑Canada Trade Risk ↑2026-08-23
US-Canada Trade War Breaks Open: 50% Tariffs Active, Carney Says ‘At War,’ Retaliation Set for Sept 8
Canada Trade Risk ↑Dollar ↑US Industrials ↓