Brother Jeb? Poppy might like it, but a little too dynastic for most Americans.

Dr. Frist? Karl's fave, but hasn't shown himself ready for the big leagues yet. 

Texas Tom? Too much dirty laundry. 

Coach Hastert? Please. 

George Allen? Scary thought.

St. Santorum? God forbid.

Straight-shooter McCain? That would guarantee a Republican successor, because it would help McCain overcome his biggest obstacle, the Republican primary. And Bush owes him one.

Or maybe a governor, in his own image. Who are the likeliest Republican governors (other than Jeb)?

What are your thoughts?