General Counsel Jennifer Thornton advises Ambassador Greer and USTR’s regional and functional offices on all legal matters, in addition to overseeing more than 40 attorneys and trade policy analysts within USTR’s Office of the General Counsel and the Interagency Center on Trade Implementation, Monitoring, and Enforcement (ICTIME).

WASHINGTON – Today, U.S Trade Representative Jamieson Greer and Mexican Secretary of Economy Marcelo Ebrard announced the first round of bilateral discussions in preparation for the Joint Review of the United States–Mexico–Canada Agreement (USMCA).

Published in The Hill

March 2, 2026

Published in the Financial Times

December 22, 2025

The year 2025 will be remembered as the year of the tariff, regardless of one’s economic ideology. International trade is neither good nor bad — it just is. The real question is whether trade patterns serve the national interest. For President Donald Trump and his administration, that means a trade policy that accelerates re-industrialisation.

WASHINGTON – Today, the Office of the United States Trade Representative (USTR) released the findings of its 2025 Review of Notorious Markets for Counterfeiting and Piracy (the Notorious Markets List).  The Notorious Markets List highlights online and physical markets that reportedly engage in or facilitate substantial trademark counterfeiting or copyright piracy.

WASHINGTON – Ambassador Jamieson Greer and Secretary Brooke Rollins published an op-ed in The Hill laying out the Trump Administration’s two-fold approach to create a level playing field for American farmers, ranchers, and food producers.

The full text of the op-ed is below:

WASHINGTON – United States Trade Representative Jamieson Greer delivered President Trump’s 2026 Trade Policy Agenda and 2025 Annual Report to Congress. The Trump Administration is doubling down on the America First Trade Policy in 2026 to capitalize on the wins from 2025 and keep momentum going for American workers, their families, and the U.S. economy.

CHARLOTTESVILLE — This week, Ambassador Greer spoke to University of Virginia law students about how international law can best serve—and not get in the way of—peace and prosperity.

To read his speech, click here.

WASHINGTON – Today, the Office of the United States Trade Representative invited public comment on the design of a plurilateral Agreement on Trade in Critical Minerals and policy actions to enhance the resilience of critical mineral supply chains and the downstream industries that depend on them.