Everyone is guessing Gonzales as the nominee. I'd guess that would upset the conservative base and not really aid in the confirmation process in the Senate.
I think Bush will nominate John Cornyn, a sitting Senator from Texas, he has been a Circuit Judge and a Supreme Court Judge in Texas. Has an excellent reputation as a jurist, good conservative creditials and I'd guess Senate Dems would have a tough time ranting that one of their own is "an extremist", though I'd think that Reid, the Turbine, Kennedy and that ol "Shu" from NY would embarrasing themselves trying.
tuck
I like Cornyn; Sessions too.