Supreme Court Strikes Down Trump-Era Tariffs

The Supreme Court's 6-3 decision hinged on the principle of separation of powers, ruling that the International Emergency Economic Powers Act (IEEPA) of 1977 does not grant the president the authority to impose tariffs. Chief Justice John Roberts, in the majority opinion, emphasized that the power to tax, which includes levying tariffs, is explicitly granted to Congress by the Constitution. The ruling invalidates two significant sets of tariffs: the "fentanyl tariffs" and the "reciprocal tariffs." The former imposed duties of up to 35% on goods from Mexico and Canada and 10% on Chinese imports, justified by the administration as a measure to combat drug trafficking. The "reciprocal tariffs" were a broader measure, applying a baseline 10% duty on imports from nearly all trading partners, with higher rates on countries deemed to have unfair trade practices. The economic impact of these now-illegal tariffs has been significant. Estimates suggest that over $160 billion was collected from these duties. Studies indicated that these tariffs increased costs for the average American household by approximately $1,000 in 2025. Business groups, including the U.S. Chamber of Commerce and the National Association of Wholesaler-Distributors, have called for the swift refund of these collected duties to American businesses. In a swift response to the ruling, the Trump administration announced it would pivot to a different legal authority, Section 122 of the Trade Act of 1974, to impose a new temporary global tariff of 10%. This statute allows the president to implement import surcharges for a maximum of 150 days to address balance-of-payments issues, a justification that trade experts and economists are already questioning as legally tenuous. The decision leaves in place other significant tariffs imposed under different authorities, such as the Section 232 tariffs on steel and aluminum, which are justified on national security grounds. However, the Supreme Court's ruling creates considerable uncertainty for businesses that have been navigating a volatile trade landscape and for foreign governments that had negotiated trade deals to mitigate the impact of the now-voided tariffs. Business organizations have reacted to the ruling with a call for greater stability and a more predictable trade policy. The National Association of Manufacturers stressed that the ongoing legal and policy uncertainty complicates long-term investment and planning for American competitiveness. The ruling sets the stage for further legal battles over the president's authority on trade. The new tariffs under Section 122 are expected to face legal challenges, and the process for refunding the billions collected under the IEEPA is likely to be complex and litigated in lower courts. For now, the decision marks a significant check on presidential power in the realm of international trade and returns the focus to Congress as the constitutional authority for imposing tariffs. The long-term implications for global supply chains and international trade relations will continue to unfold as the administration explores the limits of its remaining tariff authorities.