A retail giant challenges Washington over denied refunds.

Costco’s decision to sue the Trump administration erupted into headlines the moment the filings surfaced. The dispute centers on millions in tariffs the retailer argues were improperly collected after a round of reclassifications reshaped how certain imports were taxed. What looked like a bureaucratic disagreement has grown into a high stakes courtroom clash that could change how American companies recover duties in the future. Now the question hanging over Washington is simple. If Costco wins, who else follows? And if it loses, how much power shifts back to federal regulators?



