Some exports will escape the 50 per cent levies, while others face new costs. New Section 338 tariffs hit Canadian goods regardless of USMCA rules. Why The Economist and the WSJ argue the shock could force long-delayed reforms. US President Donald Trump has touted tariffs as revenue machines in public — “a BONANZA FOR AMERICA!!!” — but before the US Supreme Court his lawyer framed them as foreign-policy tools whose.