Thu, March 12, 2026 at 12:39 AM UTC
Container ships at the Port of Long Beach in Long Beach, California, US, on Friday, Feb. 20, 2026. President Donald Trump imposed a 10% global tariff on foreign goods, moving quickly to preserve his trade agenda after the US Supreme Court struck down many of the levies he imposed last year.
The US has launched a new investigation into some of its biggest trading partners after the Supreme Court struck down a key part of President Donald Trump’s tariffs policies last month.
On Wednesday, US Trade Representative Jamieson Greer said the Section 301 unfair trade practices probe could lead to new tariffs against countries including China, the European Union, India, Japan, South Korea and Mexico by this summer.
The probe could allow the US to impose tariffs on goods from any of the countries found to have engaged in unfair trade practices.
Greer said he hoped to conclude the investigations before new temporary tariffs imposed by Trump in late February expire in July.
Other countries being investigated include Taiwan, Vietnam, Thailand, Malaysia, Cambodia, Singapore, Indonesia, Bangladesh, Switzerland and Norway.
Canada, which is the US’s second largest trading partner, was not mentioned as a target of the probe.