Former Vice President Joe Biden, 2020 Democratic presidential candidate, speaks during a campaign event in Columbus, Ohio, U.S., on Tuesday, March 10, 2020.

DETROIT — The United Auto Workers union said Tuesday that it is endorsing former Vice President Joe Biden for president, citing an "assault on worker rights to organize and fair wages" under President Donald Trump.

The union said it chose to endorse Biden because of his experience under the Obama administration during the 2009 auto bailout and "anti-worker federal appointees" by the Trump administration.

"In these dangerous and difficult times, the country needs a president who will demonstrate clear, stable leadership, less partisan acrimony and more balance to the rights and protections of working Americans," UAW President Rory Gamble said in a statement.

The endorsement by the UAW, which represents more than 400,000 workers, is a win for Biden but not unexpected. The union historically endorses Democrats for president, including Hillary Clinton in 2016 and two-term former President Barack Obama.