TMJ4 Senate Debate: Ron Johnson and Mandela Barnes sparred in final debate ahead of November election

Democratic Lt. Gov. Mandela Barnes and Republican Sen. Ron Johnson faced off in the final debate in Wisconsin's U.S. Senate race, hosted by TMJ4 News at Marquette University Thursday night, just weeks before voters head to what pollsters predict to still be a tight race. TMJ4's Charles Benson and Shannon Sims moderated the live televised debate at Marquette University's Varsity Theatre.