A Newsweek article by Rich Percival reports that three former U.S. trade officials, including NAFTA negotiator Carla Hills, have urged the U.S. Court of International Trade to strike down Trump's 50 percent tariffs on Canadian goods, arguing Section 338 of the 1930 Smoot-Hawley Tariff Act is dead and invoked to dodge congressional safeguards. The White House maintains the measures protect American businesses from unfair treatment.