WQOW is reporting on the latest from State Sen. Kathleen Vinehout:  

"The poll shows that I'm about even, and I'm not even in the race yet. So that makes me want to run. The poll shows that there's no heir apparent to the Democrats. Both the candidates, myself and Mrs. Burke are relatively unknown to the voters. Both of us are going to have to get out and campaign, but we're pretty much neck and neck, and that's encouraging to me."

Sounds like someone that is going to run.  Hopefully more will join her:  Walker is vulnerable if the right candidate runs against him.