In the wake of a Supreme Court ruling that struck down a key part of his tariff strategy, the Trump administration has moved swiftly to launch a new trade offensive. On Wednesday, U.S. Trade Representative Jamieson Greer announced the opening of formal Section 301 investigations into the trade practices of 16 major trading partners.
The legal backdrop for this move is critical. On February 20, the Supreme Court ruled 6-3 that President Trump lacked the authority to impose broad tariffs using the International Emergency Economic Powers Act (IEEPA). Within hours, the administration unveiled a two-part plan to uphold duties. The first step was imposing a temporary, across-the-board 15% tariff on all imports for 150 days using Section 122 of the Trade Act of 1974. The second, more significant step is the initiation of Section 301 investigations.
Section 301 of the Trade Act of 1974 empowers the U.S. Trade Representative to investigate foreign acts that burden U.S. commerce. If investigators find evidence of unfair trade practices, the U.S. can impose tariffs or other countermeasures. Treasury Secretary Scott Bessent expressed optimism, stating, “It’s my strong belief that the tariff rates will be back to their old rate within five months,” and highlighted that Section 301 has “survived more than 4,000 legal challenges.”
The investigations target what the administration calls “structural excess capacity and production in manufacturing sectors,” alleging that foreign governments have allowed industries to develop production capacity far beyond real market demand, flooding international markets. The 16 economies under scrutiny include China, the European Union, India, Japan, South Korea, Mexico, Taiwan, Vietnam, Thailand, Malaysia, Cambodia, Singapore, Indonesia, Bangladesh, Switzerland, and Norway.
The process ahead is lengthy, involving public comments, hearings, and interagency review, meaning new tariffs are not guaranteed but are a clear possibility. This development injects significant uncertainty into global markets, already strained by geopolitical tensions. Analysts point to an inherent conflict in the strategy: if tariffs successfully bring manufacturing back to the U.S., import revenue falls; if the government relies on tariff revenue, imports must continue, potentially undermining the goal of restoring jobs.
USTR Greer affirmed the administration's unwavering direction, stating the goal remains to “Protect American jobs and to make sure we have fair trade with our trading partners.” Despite the legal setback on emergency powers, the administration is signaling a continued hardline trade policy, using Section 301 as its new primary legal weapon.
