"Interesting that Clarke is a registered Republican and listed in his testimony the Republican presidents he voted for."

Oh, but if you're going to talk about Clarke's personnal issues to find insight into his credibility, you have to wonder if Clarke resented having to report to a lower level White House official, an effective demotion for a Washington, and to being passed over for promotion prior to resigning. I'm sure he harbors no resentment and has no interest in selling his book.