1. Costco is suing over Trump tariffs, claiming misuse of executive authority. 2. Supreme Court's skepticism could impact Costco's refund prospects. 3. Total tariffs collected surged to $195 billion in fiscal 2025. 4. A third of Costco’s sales involve imports, primarily from China, Mexico, and Canada. 5. Costco is seeking to halt tariff collections and obtain refunds.