In a forced union state you’re going to get a sizable number of conservative leaning union members. In Michigan, the Union Conservatives openly support right to work legislation and have even testified against union political fundraising on capitol hill.
http://www.unionconservatives.com/
I suspect that nearly every Michigan FReeper has been a union member at some point. I was AFL-CIO myself and hated it.
when I was working for the state, we had to sit through an initiation talk from a union rep. I pretended to listen and trashed the handouts asap