At some point, things change and you need to re-think some things - like whether politics is worth sticking around with.
As Peggy Noonan points out, today's GOP would expel Ronald Reagan for insufficent ideological purity. Mitt Romney has been theologically lynched by Mike Huckabee, to the apparent approval of the GOP primary electorate. The other candidate with a superb resume, Rudy Giuliani, has been ruled out as well.
Both parties have gone insane. The GOP is pandering to a bunch of people who, in the name of some culture that they have not defined, will run the economy into the ground. Naturally, they will claim that those who oppose their views on issues like immigration or their moral crusades have sold their souls or are traitors.
The alternative is to elect a party that is singularly incompetent in national security matters and who wants to tax me into oblivion (I do hope to use my novel-writing and screenwriting as a means to make a fair amount of money).
Either way, I'm hosed. Now, what remains is to figure out what sort of political home I have left, if any. The Republican Main Street Partnership and Republican Leadership Council appear to be the best options for me at this time.
And for the first time, it becomes very likely that sitting out 2008 may be my only real option. Either that or I write my vote in.