How this populist Democrat is taking on Ron Johnson in Wisconsin

Wisconsin has experienced its share of political wildcards: being snubbed by Hillary Clinton, handing Donald Trump and Joe Biden victories, and hosting a COVID-19 debacle at the Democratic National Convention.

Now, Democrats are hoping for another surprise in the making: a populist millennial senator.

Democrats have gone all-in on Mandela Barnes, the state’s 35-year-old lieutenant governor, to oust Republican Sen. Ron Johnson (Wis.) as part of their keep-the-Senate s...