U.S. 50% Tariff on $20 Billion in Canadian Imports Takes Effect as Trade Talks Collapse

A 50% U.S. tariff on $20 billion in Canadian imports took effect at midnight August 22–23, 2026, after U.S.–Canada trade negotiations collapsed. The move ends roughly a year of tariff de-escalation that began when Canada lifted most counter-tariffs on U.S. goods in September 2025. Prime Minister Carney announced dollar-for-dollar retaliation effective September 8, targeting U.S. steel, dairy, appliances, and agriculture.