Fain and the UAW, which endorsed Biden in January, are important allies of Biden and are expected to play a critical role in helping Biden win in key swing states including Michigan, where the UAW is based.
Fain, who announced the UAW's endorsement of Biden in January, has repeatedly rebuked Trump, the Republican former president.
"Donald Trump stands against everything we stand for as a society," Fain said in his January endorsement of Biden.
Fain also received a mention from Biden at this year's State of the Union address, which Fain attended.
On Wednesday, actor George Clooney, a Democrat who has backed Biden, withdrew his support in an opinion piece in the New York Times.
Persons:
Shawn Fain, Joe Biden's, Donald Trump, Fain, Biden, Trump, General Motors, Jonah Furman, George Clooney
Organizations:
United Auto Workers, UAW, Biden, U.S, Ford, General, Stellantis, Republican, Wednesday, AFL, NATO, Detroit, Democratic, Trump, Democrats, Democrat, New York Times
Locations:
Michigan, U.S, year's State