The move escalates supply chain warfare and comes a day after the Biden administration expanded curbs on the sale of advanced American technology to China.
Automakers and parts suppliers would struggle if President-elect Donald J. Trump followed through on his threat to impose 25 percent tariffs on imports from Canada and Mexico.
Many vehicles popular in the United States are assembled in Canada and Mexico, including the Chrysler Pacifica minivan, which is made in Windsor, Ontario.
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