Hope you haven't gone a bridge too far. Dumais comes from an uber liberal district and is supported and well financed by uber wealthy liberal democrats. Don't waste your time, energy, or money. Focus on places where it will have an impact. Even then, those who are in strong districts elsewhere will contribute or divert contributions to those who aren't.
The battles will be fought in more marginal areas, marginal reps, and probably more importantly, in the courts. Hopefully before Scalia, et al retire.
With respect, I think you're not seeing the big picture here.
It's a given that whoever comes from that district will be a leftie...but if we can replace Dumais, even if it's with another left-wing Democrat, the lesson will have been taught that there is a political price to pay for voting to abridge our rights.