The probe, launched under Section 301 of the Trade Act of 1974, could result in new tariffs and trade measures if foreign practices are deemed unreasonable or discriminatory.
The economies under investigation include China, the European Union, Japan, India, South Korea, Mexico, Taiwan, Vietnam, Thailand, Malaysia, Cambodia, Singapore, Indonesia, Bangladesh, Switzerland and Norway.
Focus on industrial overcapacity
The investigation comes amid concerns that several foreign economies are producing more goods than they can consume domestically, exporting excess production, and displacing U.S. manufacturing.
U.S. Trade Representative Jamieson Greer said:
“The United States will no longer sacrifice its industrial base to other countries that may be exporting their problems with excess capacity and production to us. Today’s investigations underscore President Trump’s commitment to reshore critical supply chains and create good-paying jobs for American workers.”
Officials noted that in many sectors, U.S. companies have lost domestic production capacity or fallen behind foreign competitors due to these practices.
The probe will examine whether the acts, policies, or practices of these economies are unreasonable, discriminatory, or restrict U.S. commerce, as outlined under Section 301(b) of the Trade Act.
Section 301 investigations explained
Section 301 empowers the U.S. Trade Representative to respond to unfair foreign trade practices that burden U.S. commerce. Investigations can be self-initiated and may lead to tariffs, quotas, or other trade remedies if violations are confirmed.
The current investigations will include consultations with governments of the 16 economies. Public comments on the investigations open on March 17, 2026, with a submission deadline of April 15, 2026, and a public hearing scheduled for May 5, 2026.
Potential impact on global trade
Analysts warn that the investigations could trigger a new wave of trade tensions, especially for industries such as automotive, electronics and consumer goods, where excess production in foreign countries has been most pronounced.
The EU and other trading partners are monitoring developments closely, while countries like China and Japan have already indicated plans to engage in consultations with U.S. officials.
Experts say the investigations underscore the Trump administration’s focus on reshoring supply chains, strengthening U.S. manufacturing, and addressing trade imbalances. Any resulting tariffs or trade measures could have significant implications for global supply chains, trade flows, and investment decisions across multiple continents.
Next steps
- Public comments open: 17 March 2026
- Submission deadline: 15 April 2026
- Public hearing: 5 May 2026
- Potential trade measures: Summer 2026
The investigations are being closely watched by governments, multinational corporations, and trade policy experts as a potential turning point in U.S. trade strategy and industrial policy.