Wisconsin seems like a fairly intelligent state. Why do they put up with this nut job? Aren't the residents embarrassed by him?
Wisconsin is an extremely divided state where results pretty much come down to turnout. Johnson ran in favorable years for his party, which 2022 seems more likely than not to be.
I think this analysis is completely incorrect. In 2018, Tony Evers barely won whereas Tammy Baldwin substantially overperformed his performance. Wisconsin voters seem to be the definition of swing voters. Ron Kind also has substantial overperformances. If Wisconsin "pretty much came down to turnout", you would not see candidates doing substantially different in the same election cycle.