Chertoff? Ted Olson? Some lesser conservative star?
I say it could be Orrin Hatch, for these reasons:
1. He can continue to provide cover for the Bushies as the investigations move forward, maintaining that year-and-a-half-head start the criminals still need. Hatch is a loyalist and Bush won't name anything but.
2. A tenure as AG, even a caretaker one, could be considered a capstone to his lengthy career in public service.
3. He can rest easy knowing another ultra-conservative will replace him in the Senate, by appointment and/or special election. Hatch is too old to give a damn about sticking around, hoping for a GOP majority comeback now quite unlikely in his remaining lifetime (and hopefully, for that matter, his children's).
4. No chance of him achieving his greatest ambition -- getting to the Supreme Court -- with a Democratic presidency coming in 2008.
5. A Hatch appointment avoids a bruising confirmation battle; something Bush has never shied from before, but may no longer have the stomach to fight. A Chertoff confirmation is guaranteed to keep stirring the turd, to say nothing of whomever might be named to replace him at DHS.