Plausible Republican primary challengers:
Greg Abbott (AG)
Dan Branch (State Rep)
David Dewhurst (Lt. Gov - if he loses the Senate primary, which is unlikely)
Tom Leppert (fmr. Dallas mayor)
Debra Medina (again...)
Joe Straus (State House Speaker)
Plausible Democratic candidates:
Chet Edwards (fmr. US Rep)
John Sharp (fmr. Comptroller)
Bill White (fmr. Houston mayor, '10 candidate)
Wild-card ideas:
Robert Gates (fmr. Sec. of State, probably as a Dem)
Kay Bailey Hutchison (again, but this time as a Dem or independent)
Drayton McLane (businessman/former Houston Astros owner, as Rep or independent)
Ron Paul (as Libertarian or independent)
'
Both Gates (D) and KBH as an independent could be really interesting. How would you rate their chances?