It's morally mandatory, a matter of intellectual decency, to demand of Bush's erstwhile Koolaid sippers that they look into themselves, into their willed credulity and their wild ideology, and ask how they could for so long have overlooked the idiocy, corruption, ignorance, fatuousness, bullying, and fantasizing that now strike them as obvious. "Whoops, sorry about that" won't do.
At least the idiot Santorum says "screw my constituents, I'm doing what I think is right". There is a bit to admire there. But you other guys, explain to us how you could have been so wrong for so long.