Amazing what happens when people would rather see 100% PURE DEMOCRATS than 80% Republicans in office!!!!! IDIOCY REIGNS!! Thanks!!
Its not as simple as that. If the candidate with an R next to his name is just as liberal as the candidate with a D next to their name why would a conservative fund either one of them? If the D wins then at least you can blame them for the failures their policies inevitably cause. If the R wins you get to read about how even R's now support gun control, or how Obamacare is really just Romneycare applied nationwide.
And you can be sure the press isn't going to give the R's a pass on the inevitable failure of liberal policies. Notice how Republicans get blamed for wars, the Patriot Act, etc. but Democrats who do the exact same thing don't.
If we have to endure liberal politicians, let them be Democrats.