Jamieson Greer

Rule Changes

Signed final determination imposing forced-labor tariffs on July 23, 2026

At 12:01 a.m. on July 24, 2026, the US imposed new import duties of 10% or 12.5% on goods from 60 economies covering nearly all major US trading partners. The tariffs, signed by Trade Representative Jamieson Greer on July 23, came after five months of investigation, 2,100-plus public comments, and three days of hearings with over 100 witnesses.

Updated Aug 1

Rule Changes

Leading the US negotiating effort

The trade deal covering roughly $1.8 trillion in yearly commerce between the United States, Mexico, and Canada came with a built-in deadline. That deadline is now. On July 1, 2026, the three governments formally opened the first joint review of the United States-Mexico-Canada Agreement (USMCA), and they have to decide whether to keep it alive for another 16 years.

Updated Jul 1

Rule Changes

Leading the Section 301 action; will preside over the July 6 hearing

Brazil sells the United States about $40 billion in goods a year. A new US trade action could add 25% to the price of most of it.

Updated Jun 2

Rule Changes

Negotiating Turnberry implementation with the European Commission

Trump and von der Leyen announced a US-EU trade framework at Turnberry, Scotland, in July 2025. The deal still isn't ratified, nearly ten months on. On May 8, Trump gave Brussels until July 4 to close it, threatening tariffs above the 25% levy already on European cars.

Updated May 31

Rule Changes

Leading Section 301 investigations

For thirteen months, the Trump administration imposed tariffs using emergency powers no president had claimed for that purpose. On February 20, the Supreme Court ruled 6-3 that those tariffs were illegal.

Updated May 30

Rule Changes

Signed trade agreement with Argentina

Argentina has protected its domestic industries with tariffs and import controls since the 1940s. On February 6, 2026, Buenos Aires signed its first bilateral trade agreement with the United States—eliminating barriers on over 200 categories of American goods and securing tariff relief on 1,675 Argentine products in return.

Updated May 27

Rule Changes

Leading AGOA modernization effort

For a quarter century, the African Growth and Opportunity Act let 32 sub-Saharan African countries ship goods to America duty-free—supporting roughly 1.3 million jobs across the continent. When Congress let the program expire in September 2025, textile workers in Lesotho lost their livelihoods, Kenyan jeans manufacturers laid off a thousand workers, and African governments scrambled to negotiate. Four months later, President Trump signed a one-year extension through December 2026.

Updated May 27

Rule Changes

Calling Canada deal 'problematic'

Canada followed the U.S. in imposing 100% tariffs on Chinese electric vehicles in October 2024. Seventeen months later, Prime Minister Mark Carney flew to Beijing and cut them to 6.1%—the first explicit break with American trade policy since Trump began his tariff offensive.

Updated May 21

Rule Changes

Leading trade negotiations and tariff implementation

The legal foundation for Trump's tariff strategy collapsed on February 20 when the Supreme Court ruled 6-3 that IEEPA does not authorize tariffs. The decision voided both the 25% Iran secondary levy and other emergency-based duties on China. Trump signed a 10% global replacement under Section 122 of the Trade Act within hours, dropping China's effective rate from 47% to about 35%.

Updated May 20