President Donald Trump has announced the imposition of a new 10% tariff on most U.S. imports, following a landmark ruling by the U.S. Supreme Court that significantly narrowed the legal foundation of the administration’s earlier global tariff framework.
In its decision, the Court held that the prior use of emergency powers to justify broad, across-the-board tariffs exceeded the scope of authority granted to the executive branch. The ruling reaffirmed that, outside of narrowly defined emergencies, Congress retains primary constitutional authority over trade and tariff policy. While the judgment invalidated one legal pathway, it did not remove all statutory tools available to the president.
Responding swiftly, President Trump invoked Section 122 of the Trade Act of 1974, which permits the president to impose temporary import surcharges of up to 15% for a limited duration when addressing balance-of-payments concerns or external economic pressures. Under this provision, the administration announced a new 10% tariff, framed as a transitional measure while broader trade and legislative options are evaluated. The tariff is officially described as a temporary import surcharge of 10% ad valorem on most goods imported into the United States, effective February 24, 2026, for 150 days.
This episode underscores an increasingly important reality for 2026: trade policy is no longer driven solely by economic strategy, but also by judicial oversight and statutory limits. For multinational firms and compliance teams, ongoing monitoring of tariff authority, litigation risk, and regulatory timelines will be essential as U.S. trade policy continues to evolve under tighter legal scrutiny.
Kindly refer to the official proclamation from the White House: