Supreme Court Chief Justice John Roberts grilled Trump Solicitor General D. John Sauer on Wednesday over the administration’s claim that tariffs are not taxes. Sauer is arguing against lower court rulings that shot down President Donald Trump’s use of emergency powers under the International Emergency Economic Powers Act (IEEPA) to levy sweeping tariffs on foreign countries – a power solely granted to Congress in the Constitution. Roberts questioned Sauer and noted Congress’s “core power” of reg