Wisconsin Lieutenant Governor Mandela Barnes announces Senate bid

Wisconsin Lieutenant Governor Mandela Barnes is jumping into a crowded Senate primary to be the Democratic nominee in 2022. His entrance heightens what is expected to be one of the marquee primaries during the midterm elections. 

Barnes joins seven other Democrats who have already launched their Senate bids. They're lining up to potentially face incumbent Republican Senator Ron Johnson, who has not yet announced if he will seek a third term.  "Hard-working families deserve every opportunity, but politicians like Senator Ron Johnson aren't delivering," Barnes tweeted on Tuesday.