I will say, he represented the most historically D district in Oklahoma. I doubt he could even make a difference against Shannon/Lankford or Fallin. Best area is probably to run against Inhofe as he's probably one the worst republicans senators ever, but even then, Inhofe would still win.
I think he would be best off running for Coburn's seat or challenging Fallin, who I doubt is safe this year. I have no reason to believe Inhofe is vulnerable. What is it about Inhofe in particular that makes him vulnerable?
He's not, its just that he's never won >60% of the vote in his elections. He's probably the least safe of the three, that's all.
