How is Rudi G's health? He bowed out of the Senate race in 2000 for prostate cancer.
I can see the conservatives either nominating Jeb Bush or McCain. I think there are enough people in this country, some conservatives included, who have had enough from the Bush name. But he is a governor and that has seemed to be the predominant path (or former VP)to the White House in the past 30+ years.
IMO, neither party has a viable strong candidate at this point for 2008.