The Republican party cannot hold its current majority without this increasingly powerful caucus. The party can continue to adapt and prevail, or splinter and lose. The great thing about big tents is that they are portable. The Republicans of the future do not have to set up the big tent on the same exact political turf of yesteryear.Indeed the so-called "Reagan Kids" were the first "South Park Republicans". During the 80s we listened to rude music, drank, many of the women dressed skimpy-sexy, and we didn't behave ourselves at all. The media reflected our tastes largely because Reagan's libertarian-minded FCC appointees were very reluctant to regulate content. And 60-70% of us supported Reagan. The Dems were in a panic over that last part. I personally suspect that the rise of often whiny "alternative" was part of an effort by the liberals in the entertainment biz to stem that tide.
So in reality, the GOP hasn't been able to win without the "South Park Republicans", many of whom were chased away by the 1992 "culture war" convention, for nearly 20 years.
-Eric