Costco has become the largest company to sue the Trump administration over federal tariffs, filing a lawsuit aimed at securing a full refund if the U.S. Supreme Court rules the president’s sweeping tariffs illegal. The court heard arguments on the case last month but has not indicated when a decision will be announced. Other companies, including Revlon and Bumble Bee Foods, have filed similar lawsuits seeking relief from tariffs imposed under the administration.

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