President Trump is invoking an unused provision of the 1930 Smoot-Hawley Tariff Act to impose additional tariffs on Canada over alleged discrimination against U.S. exports. White House spokesperson Kush Desai: 'Trump's use of Section 338 tariffs on Canadian imports were narrow, targeted, and in response to unfair Canadian trade practices. Comparing the President's recent executive action with the full gambit of tariffs enacted in 1930 during the Great Depression is a moronic exercise.'