Incumbent U.S. Senator Ron Johnson (R) and Lt. Gov. Mandela Barnes (D) jot down notes prior to U.S. Senate Debate Friday, Oct. 7, 2022, located at Studios of Milwaukee PBS in Milwaukee.

Ron Johnson and Mandela Barnes clash in Wisconsin U.S. Senate debate

After tens of millions of dollars in dueling ads and weeks of circling each other on the campaign trail, Wisconsin Republican U.S. Sen. Ron Johnson and his Democratic challenger, Lt. Gov. Mandela Barnes, finally squared off in their first debate Friday night. Meeting in a Milwaukee television studio with just a month to go before…