What to know about Canada’s escalating trade war with the US as Carney retaliates with tariffs

Canada’s retaliatory tariffs on about $20 billion worth of U.S. goods take effect Tuesday, turning its escalating trade war with President Donald Trump into a test watched far beyond the border: Can a country much smaller than the United States stand up to Trump and succeed

September 8, 2026Updated: September 8, 2026

By ROB GILLIES