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Supreme Court Says Trump Tariffs Are Illegal. So What Happened and What's Next?

Remember the Kawasaki case against tariffs? It was filed with the US Court of International Trade, and Team Green was far from alone in expressing its displeasure through legal filings in this manner. Plenty of other very recognizable household names like Costco, YETI Coolers, Goodyear Tires, and even GoPro have so far joined the list of companies looking to have these tariffs dismissed, and also to have the money they've already paid for tariffed shipments refunded.

The ITC, however, put all of those cases on hold while it awaited a final, lasting decision from the US Supreme Court regarding whether the IEEPA tariff declaration was even legal for the President to issue in the first place.

On February 20, 2026, the Supreme Court finally issued this long-awaited decision. In a 6 to 3 opinion, issued by Chief Justice Roberts, the Court declared the invocation of the IEEPA tariffs specifically to be illegal. If you read the opinion, you'll soon find that it very specifically mentions things like the idea that IEEPA does not "grant the President an expansive peacetime tariff power." In fact, it mentions "peacetime" and "wartime" a few times, differentiating between what's allowed in both instances.

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