The latest… Ken Adelman:

Ken Adelman is a lifelong conservative Republican. Campaigned for Goldwater, was hired by Rumsfeld at the Office of Economic Opportunity under Nixon, was assistant to Defense Secretary Rumsfeld under Ford, served as Reagan’s director of arms control, and joined the Defense Policy Board for Rumsfeld’s second go-round at the Pentagon, in 2001. Adelman’s friendship with Rumsfeld, Cheney, and their wives goes back to the sixties, and he introduced Cheney to Paul Wolfowitz at a Washington brunch the day Reagan was sworn in.

In recent years, Adelman and his friends Cheney, Rumsfeld, and Wolfowitz fell out over his criticisms of the botching of the Iraq War. Still, he remains a bona-fide hawk (“not really a neo-con but a con-con”) who has never supported a Democrat for President in his life. Two weeks from now that’s going to change: Ken Adelman intends to vote for Barack Obama.

You can read the reasons why here.  It's not because Adelman suddenly became an America-hating liberal.  It's because of McCain's temperment (i.e. his weird behavior by suspending his campaign for two days during the economic crisis), and McCain's lack of judgement (selecting Palin as Veep).

As a follow-up, watch the heads spin at The Corner.