I wouldn't go so far as "Vos is simply trying to screw over and disenfranchise a Democrat by any means available." unless you're a Wisconsin resident monitoring the activity of the legislature and know things that the rest of us don't.

My knee-jerk reaction is a less-extreme version of yours, more along the lines of Vos not being willing to do anything that would assist a Democrat but (hopefully) not actively seeking to disenfranchise him. I think that's probably supported by the fairly well-known acrimony between the Republican majority and Democratic minority in Wisconsin's legislature and politics in general (e.g. [Dem elected governor? Strip rights from the governor's office before he's seated!])