A day after he addressed local United Auto Workers at a rally in Fenton, the Missouri State United Auto Workers today announced that it is endorsing  state Sen. Chris Koster, D-Raymore, for Missouri attorney general.

Koster, a St. Louis native, is competing against state Sen. Mike Gibbons, R-Kirkwood.

At the rally,  Koster pleddged “to protect workers’ rights and high-quality jobs,” if elected.

“I am honored and humbled by the support of our state’s chapter of the United Auto Workers,” Koster said in a statement today. “For the entirety of my fifteen years in public service, both as Cass County Prosecuting Attorney and in the state Senate, I have been a tireless advocate for workers’ rights. I look forward to aggressively standing up for workers’ rights and good jobs as Missouri’s Attorney General.”

As his release states, “The Missouri State UAW represents nine local unions, and 40,900 auto workers in the state of Missouri.

“As Cass County Prosecuting Attorney, Koster successfully prosecuted the largest number of prevailing wage violations of any county prosecutor in the state. He is the only candidate for Attorney General with any experience prosecuting labor law violations,” Koster’s campaign says.