For almost a year, most of the largest U.S. retailers have spoken openly about the impact tariffs are having on their margins as they justify price increases for customers. Executives have addressed the issue on earnings calls, in TV interviews and onstage at conferences.

But only one has made its dissent known in court: Costco.

The warehouse club became the largest company - and the first major retailer - to sue the Trump administration last week, seeking a full refund for the levies it has paid this year. The Supreme Court heard arguments in November on whether President Donald Trump has legal authority to impose tariffs on goods from nearly all countries, and it is expected to rule in the coming weeks or months. If it rejects the administration’s case that tariffs are justified as an

See Full Page