By Andrea Shalal

WASHINGTON (Reuters) - United Auto Workers President Shawn Fain on Thursday said hundreds of thousands of U.S. jobs were at stake if former President Donald Trump won the Nov. 5 presidential election and made good his promise to revoke the Inflation Reduction Act and its investments in electric vehicles.

Democrats have seized on comments from Trump's running mate, U.S. Senator JD Vance of Ohio, in which he declined to commit to maintaining the $500 million investment to help GM convert an old Cadillac plant into an electric vehicle facility, arguing that removing the funds risk some 650 jobs in Lansing, Michigan.

"It's a lot bigger than just the Lansing Grand River investment. It's factories all over the United States, and it's supply chain factories all over the United States that are being put in place now. So you're talking hundreds of thousands of jobs that Donald Trump is just writing off," Fain told reporters ahead of a Trump visit to Detroit later on Thursday.