The United States has initiated a comprehensive Section 301 investigation into numerous trading partners following a Supreme Court decision that invalidated a significant portion of former President Donald Trump’s tariff policies. US Trade Representative Jamieson Greer announced the probe on Wednesday, indicating it could result in new import taxes against multiple nations by summer.
The investigation targets an extensive list of economies including China, the European Union, India, Japan, South Korea, Mexico, Vietnam, Thailand, Malaysia, Cambodia, Singapore, Indonesia, Bangladesh, Switzerland, and Norway. Notably absent from the target list is Canada, America’s second-largest trading partner.
This development emerges weeks after the Supreme Court declared Trump’s previous global tariffs, implemented in April last year, legally invalid. The court’s decision prompted immediate criticism from Trump, who denounced the ruling as “terrible” and disparaged the justices as “fools.” In response, the administration swiftly announced a new 10% global tariff, though conflicting statements emerged regarding whether this would increase to 15%.
Greer emphasized the administration’s renewed trade stance, stating, “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.” The investigation aims to conclude before temporary tariffs imposed in late February expire in July, providing the administration with a legally sound foundation for future trade measures.
The timing coincides with planned high-level talks between US and Chinese officials in Paris this weekend, which are expected to set the stage for a potential meeting between Trump and Chinese President Xi Jinping in Beijing at March’s end.









