Costco files a lawsuit against the Trump administration seeking a refund for tariffs.

Costco is suing the Trump administration for a refund on tariffs it paid following the imposition of global levies under a national emergency declaration. The retail giant acknowledges that the U.S. Supreme Court will rule on the tariffs' legality but is taking legal action to prevent Customs and Border Protection from finalizing payments by December 15, which would complicate refund claims. The lawsuit aims to secure a complete refund and prevent further tariffs. Experts predict a potential surge in refund requests if the Supreme Court rules against the levies, which totaled $108 billion by October.