U.S. Tariffs and Supreme Court Rulings

On March 11, 2026 U.S. Trade Representative Jamieson Greer opened broad Section 301 probes into manufacturing and practices such as excess capacity, subsidies and wage suppression in a wide set of jurisdictions — including China, the EU, Japan, Mexico, South Korea, Taiwan, Vietnam, India and several Southeast Asian nations — and launched a separate 301 investigation aimed at banning imports made with forced labor, sequencing the actions to align with the July 24 expiration of existing 10% Section 122 tariffs so the administration can rebuild or reshape duties before that deadline while Commerce pursues parallel Section 232 reviews. The administration also told the U.S. Court of International Trade that processing refund claims for roughly 53 million import entries (about $166 billion in disputed tariff revenue) could take millions of manual work hours, has taken steps to slow refunds and resisted returning the money, prompting the court to demand an updated position.