Michigan Governor Gretchen Whitmer has issued another warning about the threat tariffs pose to the North American auto industry.

The details: Whitmer, who has been outspoken about the sweeping levies imposed by President Trump, reaffirmed her concerns during a keynote address in Toronto Wednesday, spotlighting how the policies are rippling across the U.S. and Canadian auto sectors.

  • Auto companies in both countries are stockpiling parts and laying off workers.

  • Bonus checks for autoworkers are shrinking by thousands of dollars.

  • Auto suppliers are facing higher costs and delaying business expansions.

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“The blockade of the Ambassador Bridge in 2022 hit our auto and agriculture industries hard,” said Whitmer. “Commerce stalled and workers lost a combined $144 million in wages. Tariffs are threatening to make that temporary nightmare a permanent reality.”

Why it matters: Tariffs are creating meaningful cost increases across the North American auto supply chain while shrinking autoworker pay and forcing suppliers to delay growth.

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Between the lines: Whitmer, who noted that duties on automotive goods entering the U.S. totaled around $17.4 billion, also warned that China is poised to benefit most from the tariffs.

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“When we say no to Canada, we say yes to China,” said Whitmer.

Her reasons:

  • Tariffs on Canada and Mexico increase costs and inefficiencies for U.S. automakers.

  • By making North American production costlier, tariffs could allow China's subsidized, low-cost auto industry to capture more market share in Canada and Mexico.

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“Just look at Europe, where Chinese EVs and batteries are gobbling up market share,” said Whitmer, noting that the U.S., Canada, and Mexico conduct nearly $1.8 trillion of trade under the United States-Mexico-Canada Agreement, or USMCA.”

“More than 12 million European direct and indirect auto industry jobs are at risk. And the iconic German brand, Volkswagen, was forced to shut down a plant for the first time in its 87-year history last year,” she added.

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