The Trump Administration’s Plan B: The USTR Announces 76 New Section 301 Investigations

Key Takeaways

• 76 Section 301 probes launched across 76 economies
• Excess capacity probe targets 16 countries, including China, EU
• Forced labor probe includes 60 economies, such as Canada, UK
• Comments due April 15; hearings start May 2026
• Companies must evaluate tariff exposure now

Summary

On March 11‑12, 2026 the U.S. Trade Representative announced 76 new Section 301 investigations, targeting 16 economies for alleged structural excess capacity and 60 economies for alleged forced‑labor violations. The USTR has set an April 15, 2026 deadline for written comments and will hold public hearings in May. While tariffs are not guaranteed, the Trump administration has positioned Section 301 as a “Plan B” tool after the Supreme Court blocked IEEPA‑based duties. Import‑dependent firms are urged to assess exposure now.

Pulse Analysis

Section 301, a cornerstone of U.S. trade enforcement, allows the USTR to act unilaterally against practices deemed unreasonable or discriminatory. After the Supreme Court invalidated IEEPA‑based tariffs, the Trump administration has earmarked Section 301 as its fallback mechanism, a strategy often referred to as “Plan B.” This legal framework grants the USTR broad discretion to impose duties, suspend agreements, or negotiate new commitments, with no statutory ceiling on tariff rates, making it a potent lever in trade disputes.

The latest round of investigations splits into two distinct tracks. The first examines whether 16 identified economies—ranging from China and the EU to Indonesia and Mexico—possess structural excess manufacturing capacity that floods the U.S. market, potentially displacing domestic producers. The second scrutinizes 60 economies for inadequate enforcement of bans on forced‑labor goods, a concern that could give unethical producers a price advantage. Both probes follow a tight timeline: written comments are due by April 15, 2026, with hearings slated for early May, after which the USTR may recommend remedial measures, including new tariffs.

For businesses with international supply chains, the stakes are immediate. Even the prospect of higher duties can prompt firms to renegotiate contracts, diversify sourcing, or invest in compliance documentation to influence the USTR’s final determinations. Moreover, the investigations signal a broader shift toward using trade law as a policy tool, potentially prompting other nations to pre‑emptively adjust their trade practices. Companies that proactively engage in the comment process and conduct thorough exposure analyses will be better positioned to mitigate cost shocks and maintain competitive advantage.