Newsom asks Supreme Court to strike down Trump’s tariffs

The State of California filed an amicus brief urging the U.S. Supreme Court to strike down President Trump’s tariffs imposed under the International Emergency Economic Powers Act (IEEPA).

• Main action: California (Governor Gavin Newsom and Attorney General Rob Bonta) filed an amicus brief asking the U.S. Supreme Court to rule that IEEPA does not authorize tariffs; oral argument scheduled for November 5, 2025 before the Supreme Court.
• Background & details: California says the tariffs (described as 10%–145%) have deprived California of $25 billion and more than 64,000 jobs and cites a claim that $20 billion was sent to Argentina; California previously filed a lawsuit on April 16, 2025 challenging the President’s authority and has filed amicus briefs in related cases (Oregon v. Trump, Learning Resources, Inc. v. Trump) in the Court of International Trade and D.C. Circuit.