Supreme Court Nixes IEEPA Tariffs; Trump Counters With 10% Stop-Gap Duty

The decision recalls the Supreme Court’s 1935 Schechter Poultry ruling that dismantled key New Deal codes when FDR over-reached statutory bounds; in both moments the Court reaffirmed that economic ‘emergencies’ do not suspend Article I taxing powers. Since Truman’s 1952 attempt to seize steel mills and the post-9/11 expansion of executive emergency tools, presidents have steadily tested the perimeter of delegated crisis authority. The majority’s reliance on the modern ‘major questions’ doctrine signals a structural swing back toward congressional control of trade—a realm Congress last actively steered with the 1974 Trade Act. Over a 100-year horizon this case matters because tariffs were the young republic’s primary revenue source (1790–1913) and remain a potent foreign-policy lever; who wields that lever will shape how the U.S. navigates future supply-chain shocks and great-power rivalry. If Congress refuses to legislate, the ruling may merely reroute, not restrain, unilateral trade action, but if lawmakers seize the opening, it could reset the balance of economic war-powers for generations.