In a significant move, Costco has filed multiple lawsuits against the Trump administration, seeking a full refund of tariffs imposed under the International Emergency Economic Powers Act. The retailer has joined a growing number of businesses demanding refunds as they challenge the legality of these tariffs ahead of a Supreme Court ruling. With its claims, Costco has become the largest company yet to pursue refunds amid rising concerns over the financial burden of these taxes. The lawsuits argue that the tariffs are unlawful and seek to preserve refunds in the event that the Supreme Court finds them invalid. This legal action has sparked a wide-ranging discussion about the impact of tariffs on prices and the economy, with various companies, including Japanese and American firms, also stepping forward in similar lawsuits.