US Supreme Courts Ruling on Additional Tariffs Under the International Emergency Economic Powers Act IEEPA

This report outlines the U.S. Supreme Court's ruling on February 20, 2026, regarding the legality of additional tariffs under the International Emergency Economic Powers Act (IEEPA), the events leading up to the ruling, and the measures taken by the Trump administration afterward. It also summarizes the potential challenges that the IEPA tariffs, now deemed illegal, may raise in the future.