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Supreme Court Strikes Down Trump’s IEEPA Tariffs as President Signs 10% Replacement for 150 Days

The 6–3 ruling curbs use of emergency economic powers, reaffirming Congress’s primacy over tariff policy.

Overview

  • Chief Justice John Roberts wrote the majority opinion joined by Justices Neil Gorsuch and Amy Coney Barrett with the three liberals, while Justices Brett Kavanaugh, Clarence Thomas and Samuel Alito dissented.
  • The decision finds IEEPA does not authorize broad tariff-setting, leaving sectoral measures under other statutes such as Section 232 and Section 301 in place.
  • Trump announced he had signed a new global 10% tariff effective February 24 for 150 days under Section 122 authority, and the White House said tariffs remain central to his trade approach.
  • Importers may pursue refunds for duties already collected, with reporting citing roughly $120 billion at stake and expectations of extended litigation as markets in Europe ticked higher.
  • The EU requested clarity and the European Parliament paused a planned vote on a U.S.–EU tariff arrangement, while the challenges originated with Learning Resources and expanded to 12 states and about 1,000 companies.