Milfred and Hands assess the crowded field of 11 Democrats hoping to win the party's nomination to take on U.S. Sen. Ron Johnson, R-Oshkosh, in next year's election. Wisconsin's Senate seat is one of three toss-up Senate races across the country. That means voters here could decide who controls the U.S. Senate. Wisconsin Lt. Gov. Mandela Barnes is the front-runner in the Democratic primary, though he's hardly invincible, our political podcasters agree. They play audio clips from the top Democrats touting their bids, while assessing the broader political ramifications.