U.S. files first trade complaint with Mexico under USMCA In this Nov. 30, 2018 file photo, President Donald Trump, center, sits between Canada's Prime Minister Justin Trudeau, right, and Mexico's President Enrique Pena Nieto after they signed a new United States-Mexico-Canada Agreement that is replacing the NAFTA trade deal, during a ceremony at a hotel before the start of the G20 summit in Buenos Aires, Argentina. U.S. and Mexican unions have filed on Monday, May 10, 2021, the first labor complaint against Mexico under the U.S.-Mexico-Canada free trade pact. MEXICO CITY (AP) — The United States filed its first labor complaint with Mexico Wednesday under the U.S.-Mexico-Canada trade agreement after an old-guard union was caught allegedly destroying ballots at a General Motors plant in northern Mexico.