The General Motors plant is seen as its workers are to vote on whether to reject or keep the collective bargaining agreement, marking the first major test of labor rules under the United States-Mexico-Canada Agreement (USMCA), in Silao, Mexico August 17, 2021. REUTERS/Sergio Maldonado 

Workers sit outside the General Motors plant as its employees are to vote on whether to reject or keep the collective bargaining agreement, marking the first major test of labor rules under the United States-Mexico-Canada Agreement (USMCA), in Silao, Mexico August 17, 2021. REUTERS/Sergio Maldonado 

Mexican state police stand guard outside the General Motors plant as its workers are to vote on whether to reject or keep the collective bargaining agreement, marking the first major test of labor rules under the United States-Mexico-Canada Agreement (USMCA), in Silao, Mexico August 17, 2021. REUTERS/Sergio Maldonado 

The General Motors plant is seen as its workers are to vote on whether to reject or keep the collective bargaining agreement, marking the first major test of labor rules under the United States-Mexico-Canada Agreement (USMCA), in Silao, Mexico August 17, 2021. REUTERS/Sergio Maldonado 

Workers sit outside the General Motors plant as its employees are to vote on whether to reject or keep the collective bargaining agreement, marking the first major test of labor rules under the United States-Mexico-Canada Agreement (USMCA), in Silao, Mexico August 17, 2021. REUTERS/Sergio Maldonado 

A woman enters the General Motors plant, next to a sign reading "No weapons allowed," as its workers are to vote on whether to reject or keep the collective bargaining agreement, marking the first major test of labor rules under the United States-Mexico-Canada Agreement (USMCA), in Silao, Mexico August 17, 2021. REUTERS/Sergio Maldonado 

A worker of the General Motors Silao plant holds a copy of the collective contract he and his colleagues will vote to keep or reject, with repercussions under the new USMCA trade agreement, in Silao, Mexico August 13, 2021. Picture taken August 13, 2021. REUTERS/Daina Solomon 

U.S. Trade Representative Katherine Tai, Mexican Economy Minister Tatiana Clouthier and Canadian Minister of Small Business, Export Promotion and International Trade Mary Ng attend an event to commemorate the first anniversary of the entry-into-force of the United States-Mexico-Canada Agreement (USMCA/T-MEC/CUSMA), in Mexico City, Mexico July 7, 2021. REUTERS/Edgard Garrido 

U.S. Trade Representative Katherine Tai, Mexican Economy Minister Tatiana Clouthier and Canadian Minister of Small Business, Export Promotion and International Trade Mary Ng attend an event to commemorate the first anniversary of the entry-into-force of the United States-Mexico-Canada Agreement (USMCA/T-MEC/CUSMA), in Mexico City, Mexico July 7, 2021. REUTERS/Edgard Garrido 

U.S. Trade Representative Katherine Tai, Mexican Economy Minister Tatiana Clouthier and Canadian Minister of Small Business, Export Promotion and International Trade Mary Ng attend an event to commemorate the first anniversary of the entry-into-force of the United States-Mexico-Canada Agreement (USMCA/T-MEC/CUSMA), in Mexico City, Mexico July 7, 2021. REUTERS/Edgard Garrido 

A poster with a picture of Mexican labor lawyer Susana Prieto, placed during a protest to demand her liberation after being arrested in early June for accusation of committing crimes against public servants, including threats and inciting a riot, is seen in Ciudad Juarez, Mexico July 1, 2020. REUTERS/Jose Luis Gonzalez 

A man crosses the Paso del Norte border bridge towards El Paso, Texas, U.S., as seen from Ciudad Juarez, Mexico, July 1, 2020. REUTERS/Jose Luis Gonzalez 

The flags of the U.S. and Mexico flutter at the Paso del Norte border bridge as seen from Ciudad Juarez, Mexico, July 1, 2020. REUTERS/Jose Luis Gonzalez 

Trucks are seen near the border customs control before crossing into the U.S., at the World Trade Bridge in Nuevo Laredo, Mexico June 30, 2020. REUTERS/Daniel Becerril 

Trucks wait in a long queue for border customs control to cross into the U.S., at the World Trade Bridge in Nuevo Laredo, Mexico June 30, 2020. REUTERS/Daniel Becerril 

Trucks wait in a long queue for border customs control to cross into the U.S., at the World Trade Bridge in Nuevo Laredo, Mexico June 30, 2020. REUTERS/Daniel Becerril 

Trucks wait in a long queue for border customs control to cross into the U.S., at the World Trade Bridge in Nuevo Laredo, Mexico June 30, 2020. REUTERS/Daniel Becerril 

Trucks wait in a long queue for border customs control to cross into the U.S., at the World Trade Bridge in Nuevo Laredo, Mexico June 30, 2020. REUTERS/Daniel Becerril 

Trucks wait in a long queue for border customs control to cross into the U.S., at the World Trade Bridge in Nuevo Laredo, Mexico June 30, 2020. REUTERS/Daniel Becerril 

Trucks wait in a long queue for border customs control to cross into the U.S., at the World Trade Bridge in Nuevo Laredo, Mexico June 30, 2020. REUTERS/Daniel Becerril TPX IMAGES OF THE DAY 

Trucks wait in a long queue for border customs control to cross into the U.S., at the World Trade Bridge in Nuevo Laredo, Mexico June 30, 2020. REUTERS/Daniel Becerril 

Trucks wait in a long queue for border customs control to cross into the U.S., at the World Trade Bridge in Nuevo Laredo, Mexico June 30, 2020. REUTERS/Daniel Becerril 

A carrier trailer transports Toyota vehicles for delivery while queuing at the border for customs control to cross into the U.S., at the Otay border crossing in Tijuana, Mexico June 30, 2020. REUTERS/Jorge Duenes 

Carrier trailers transport Toyota vehicles for delivery while queuing at the border for customs control to cross into the U.S., at the Otay border crossing in Tijuana, Mexico June 30, 2020. REUTERS/Jorge Duenes 

Carrier trailers transport Toyota vehicles for delivery while queuing at the border for customs control to cross into the U.S., at the Otay border crossing in Tijuana, Mexico June 30, 2020. REUTERS/Jorge Duenes 

Carrier trailers transport Toyota vehicles for delivery while queuing at the border for customs control to cross into the U.S., at the Otay border crossing in Tijuana, Mexico June 30, 2020. REUTERS/Jorge Duenes 

A carrier trailer transports Toyota vehicles for delivery while queuing for border customs control to cross into the U.S., at the Otay border crossing in Tijuana, Mexico June 30, 2020. REUTERS/Jorge Duenes 

Job seekers fill out job application forms for assembly factories as the coronavirus disease (COVID-19) outbreak continues in Ciudad Juarez, Mexico June 17, 2020. Picture taken June 17, 2020. REUTERS/Jose Luis Gonzalez 

Personnel of an assembly factory, in protective gear, talk to job seekers as the coronavirus disease (COVID-19) outbreak continues in Ciudad Juarez, Mexico June 17, 2020. Picture taken June 17, 2020. REUTERS/Jose Luis Gonzalez 

Personnel of an assembly factory, in protective gear, talk to job seekers as the coronavirus disease (COVID-19) outbreak continues in Ciudad Juarez, Mexico June 17, 2020. Picture taken June 17, 2020. REUTERS/Jose Luis Gonzalez 

A job seeker fills out job application forms for assembly factories as the coronavirus disease (COVID-19) outbreak continues in Ciudad Juarez, Mexico June 17, 2020. Picture taken June 17, 2020. REUTERS/Jose Luis Gonzalez 

Workers wait for Canada's Prime Minister Justin Trudeau as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Workers wait for Canada's Prime Minister Justin Trudeau as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau speaks to workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau speaks to workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau speaks to workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau takes questions from the media as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau speaks to workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau takes questions from the media as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau takes questions from the media as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau takes questions from the media as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau takes questions from the media as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau takes questions from the media as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau takes questions from the media as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau takes questions from the media as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau speaks to workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau speaks to workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau arrives as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau takes questions from the media as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau exits after visiting auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau greets workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau greets workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau greets workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau greets workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau greets workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau greets workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

Canada's Prime Minister Justin Trudeau talks to workers as he visits auto parts company ABC Technologies to talk about the USMCA trade agreement, in Brampton, Ontario, Canada January 30, 2020. REUTERS/Mark Blinch 

U.S. President Donald Trump poses for a selfie during a signing ceremony for the United States-Mexico-Canada Trade Agreement (USMCA) on the South Lawn of the White House in Washington, U.S., January 29, 2020. REUTERS/Jonathan Ernst 

Attendees wearing hardhats with U.S., Mexican and Canadian flags greet U.S. President Donald Trump after he signed the United States-Mexico-Canada Agreement (USMCA) trade deal at the White House in Washington, U.S. January 29, 2020. REUTERS/Jonathan Ernst? 

U.S. President Donald Trump and Vice President Mike Pence walk together after Trump signed the United States-Mexico-Canada Agreement (USMCA) trade deal at the White House in Washington, U.S. January 29, 2020. REUTERS/Jonathan Ernst?