My list of potential GOP challengers for the 2012 nod, no particular order:
Paul Ryan
Eric Cantor
John Thune
Richard Burr
Jim Demint
Tom Coburn
Mitt Romney
Sarah Palin
Tim Pawlently
Mitch Daniels
Haley Barbour
Bobbby Jindal
John Hoeven
Bob McDonnell
I like Jim DeMint too..a Palin/DeMint ticket would ROCK!
Richard Burr???