Just read some interesting pieces on the aforementioned phenomenon. I guess I fall into this category, which is ironic, since I can't stand the show.
Anyway, the gist of it is this:
"South Park Republicans each vote Republican for their own reasons. Some agree with every plank in the party's platform, in spite of having a nose ring and purple mohawk. However, most view Republicans as the lesser of two evils. Due to the quirks of our electoral system, candidates require a plurality to win, not a majority. If Libertarians wrested away half of the Republican votes in every major election, Democrats would hold nearly every seat in Congress. South Park Republicans want to avoid that, even if it means voting for Republicans when third party candidates may better reflect their views."
This piece mentions Ehrlich as an example of a Republican who fits this category - being pro-choice and pro-medical marijauna, yet vehemently opposing higher taxes.
This is really just watered-down libertarianism, which is the best I can hope for in this country, I guess.
Ha! South Park Republicans are real! A little Googling turned up this.
Marc