Trump’s Canada tariffs hinge on a disputed 95-year-old law

President Trump is widening his tariff fight with Canada by invoking Section 338 of the Tariff Act of 1930, a long‑debated, “zombie” authority whose legality is questioned by scholars and who many say was superseded by later statutes. While the new 338 measures could allow bans on certain Canadian goods, experts note they cover only a small share of Canada’s exports to the U.S. and face potential legal challenges, as the broader tariff regime remains driven by other authorities and court rulings.