It is because the major source of news for the state is the Wisconsin Journal Sentinel, which has become openly a partisan opinion journal for the Left.
Their politics reporter, Patrick Marley, is considered to be so powerful, he has a virtual veto power over what legislation gets passed.
Wisconsin Republicans are reportedly terrified of him.
Politicians depend on the Media to get elected. Thus, a ideologically unified Media controls the politicians, not the other way around.
“Wisconsin Republicans are reportedly terrified of him.”
Why are they terrified of a newspaper reporter? If they have done nothing in their personal and public lives to indicate they are immoral or criminals, they should have nothing to fear.
This is how they managed to flip CA from red to ultra blue in only 20 years.
By controlling the media and the message.