Retail giant Costco, which sells hundreds of imported items ranging from tires and golf balls to mangoes and salmon, is suing the Trump administration, seeking a full refund on the duties it has paid as a result of President Donald Trump’s global tariffs imposed this year.

Costco filed a lawsuit at the U.S. Court of International Trade on Friday, saying the administration’s tariffs imposed under the International Emergency Economic Powers Act (IEEPA) are unlawful. The 1977 law has historically been used to impose sanctions against other nations.

It comes as the Supreme Court is considering whether Trump has legal authority to impose tariffs on a vast range of goods from nearly all countries. In oral arguments last month, conservative justices pondered the implications of granting the pre

See Full Page