Trump Sued by States Over New Tariffs After Supreme Court Loss

Trump’s New Tariffs Face Legal Challenge From States

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By Erik Larson

March 5, 2026 at 5:29 PM UTC

Updated on

March 5, 2026 at 9:05 PM UTC

President Donald Trump is facing a major legal challenge to the global tariffs he imposed last month after the Supreme Court struck down his earlier sweeping duties, setting up a fresh legal fight over executive power that could take months to resolve.

Trump’s proclamation placing a 10% tax on imports as of Feb. 24 is “fatally flawed” and must be overturned, two dozen states said in a lawsuit filed Thursday in the Court of International Trade in Manhattan. Trump has said he plans to increase the levy to 15%.