**Trade tensions between the United States and Canada have escalated sharply in 2026 under the Trump administration.** In July, President Trump issued proclamations under Section 338 of the Tariff Act of 1930 imposing additional 50% duties on roughly $20 billion of Canadian imports in sectors including motor vehicles, alcoholic beverages, and dairy to offset alleged discriminatory Canadian practices. Negotiations collapsed in August, triggering the tariffs effective August 22; Canada responded with matching counter-tariffs on about C$27.6 billion of U.S. goods effective September 8. The U.S. followed with further scope modifications effective September 15 and import bans on select Canadian products effective September 29. Traders are pricing in the likelihood of additional increases or extensions, including announced threats of 50% duties on Canadian autos and steel starting January 2027, amid stalled bilateral talks and USMCA review dynamics. Resolution hinges on whether any new or expanded Canada-specific tariff rate becomes effective by the market’s cutoff date without subsequent delay or suspension.