US Customs and Border Protection has begun issuing guidance on a new tariff regime targeting Canadian goods, following three presidential proclamations issued on July 20, 2026. A sweeping 50% additional duty will be imposed on nearly $20 billion in Canadian imports, covering motor vehicles, alcoholic beverages, and dairy products, under Section 338 of the Tariff Act of 1930, a Depression-era statute never before deployed against America\’s largest trading partner. These new duties stack onto existing tariffs and bypass the USMCA trade agreement entirely for the covered product categories. Energy products and potash are carved out, as are items already subject to Section 232 national security tariffs. Total bilateral trade between the two countries typically exceeds $700 billion annually.
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