Former U.S. Sen. Herb Kohl has thrown his support to Joe Biden, just days before Tuesday's Democratic presidential primary in Wisconsin.

"While working together in the Senate, I saw up close his sheer honesty, uncompromising integrity, and unwavering dedication to public service," Kohl said in a statement issued Wednesday by the Biden campaign.

Kohl said that Biden "is our strongest candidate to win in Wisconsin, take back the White House and restore the soul of our country.”

Last week, the Biden campaign announced more than 40 Wisconsin endorsements, including those from former Gov. Jim Doyle, state Senate minority leader Jennifer Shilling and state Assembly minority leader Gordon Hintz.

Independent U.S. Sen. Bernie Sanders announced state endorsements last week with U.S. Rep. Mark Pocan serving as campaign chair in Wisconsin.