Canada–U.S. tariffs, CUSMA disputes, countermeasures and related bilateral trade policy. This page is an index: the full evidence, photo credits, videos and source ledger remain attached to the dated canonical record.
September 15, 2026 · import exclusions effective September 29 · Canada trade dispute / Section 338 / Tariff implementation
Specified Canadian alcohol, dairy and motorcycle import exclusions take effect under Section 338
POLICY IMPLEMENTATION — REVISED 50% TARIFF SCOPE REMAINS IN EFFECT; SPECIFIED CANADIAN ALCOHOL, DAIRY AND MOTORCYCLE IMPORT EXCLUSIONS TOOK EFFECT SEPTEMBER 29
The September 8 Section 338 proclamations reached their next implementation date at 12:01 a.m. Eastern on September 29: specified Canadian alcoholic beverages, certain dairy products including whey, and motorcycles are now excluded from importation into the United States. Associated Press estimated the affected 2025 trade at about $967 million. These are targeted product exclusions defined by the proclamations and tariff schedules, not a blanket ban on Canadian imports; the separate September 15 revision to 50% tariff coverage remains in effect.
August 24, 2026 · implementation status updated September 15 · Canada trade dispute / Autos, parts and steel / Future tariff announcement
Trump’s August 24 Canada tariff announcement is partly superseded by September 8 proclamations
POLICY RECORD — AUGUST 24 FUTURE-TARIFF STATEMENT PARTLY SUPERSEDED BY SEPTEMBER 8 PROCLAMATIONS
Trump’s August 24 statement described a broader 50% January 1, 2027 tariff plan for Canadian cars, trucks, automotive parts and steel. On September 8, the White House issued new Section 338 proclamations that changed the product scope of existing 50% duties effective September 15 and separately scheduled import bans on specified Canadian motor-vehicle, dairy and alcoholic-beverage products for September 29. Those operative proclamations supersede the earlier record’s statement that no implementing instrument had been identified, while they do not by themselves establish the full January 1, 2027 tariff package exactly as described on August 24.
July 20, 2026 · implementation and Canadian retaliation updated August 25 · Canada / Tariffs / CUSMA trade dispute
Trump announces additional 50% duties on specified Canadian dairy, alcoholic-beverage, and motor-vehicle products
POLICY RECORD — U.S. 50% SECTION 338 DUTIES IN EFFECT; CANADA PUBLISHES DETAILED COUNTER-TARIFF PLAN FOR SEPTEMBER 8
The United States’ additional 50% Section 338 duties on roughly $20 billion of Canadian goods took effect August 22 after negotiations failed. On August 25, Canada published the detailed next stage of its dollar-for-dollar retaliation: tariffs of 15%, 25% or 50% on roughly C$27.6 billion (about US$20 billion) of U.S. imports, covering about 700 products and scheduled to begin September 8. The Canadian counter-tariffs are announced and specified, but are not yet in force.
