Crist not lunatic enough for GOP?

You just gotta wonder, if Charlie Crist, in Florida, who is at best a Centrist/Conservative, is fighting for his political life and possibly about to be kicked off the GOP ticket because he's not lunatic right wing enough for what the Republican party has become, can the two party system survive? How can the US have an Ultraright party that appeals to maybe 30% of the people, and a Center Right Party that virtually no one is happy with, and that's it? And, yes, seriously, the Democratic Party is, by and large, Center Right, by any reasonable assessment that takes politics in other developed countries into account. Maybe even not-so-center Right. If you don't think so, you're kidding yourself, and ignoring facts.