Bruce Bartlett has a good...

...piece in newmajority.com entitled "Why I am Anti-Republican." (He also writes on how the tea-baggers are mistaken about being over-taxed.)

Bartlett isn't some wild-eyed liberal; he worked as a staff economist for Congressman Jack Kemp in the 1970s and helped draft the Kemp-Roth tax bill, which ultimately formed the basis of President Reagan's 1981 tax cut. He went on to work as a domestic policy advisor in the Reagan administration and was a treasury official under the first President Bush. I admire his ability to remain flexible in his thinking.