Complaint Accuses Mexican Factories of Labor Abuses, Testing New Trade Pact

The A.F.L.-C.I.O. and other groups are seeking to make use of a new enforcement mechanism in the updated North American trade deal.

WASHINGTON — The A.F.L.-C.I.O. and other groups plan on Monday to file a complaint with the Biden administration over claims of labor violations at a group of auto parts factories in Mexico, a move that will pose an early test of the new North American trade deal and its labor protections. The complaint focuses on the Tridonex auto parts factories in the city of Matamoros, just across the border from Brownsville, Texas. The A.F.L.-C.I.O. said workers there have been harassed and fired over their efforts to organize with an independent union, SNITIS, in place of a company-controlled union. Susana Prieto Terrazas, a Mexican labor lawyer and SNITIS leader, was arrested and jailed last year in an episode that received significant attention. The trade deal, the United States-Mexico-Canada Agreement, was negotiated by the Trump administration to replace the North American Free Trade Agreement and took effect last summer. While it was negotiated by a Republican administration, the deal had significant input from congressional Democrats, who controlled the House and who insisted on tougher labor and environmental standards in order to vote in favor of the pact, which needed approval from Congress.