Based on what I know, the best choices would be Cynthia Loomis (whom the Governor dislikes), Tom Sansonetti, and Randall Luthi. Any further information would be greatly appreciated, particularly with regards to their views on border security.
I see Ray Hunkins name on the list. He was the man that Freudenthal defeated in the greatest landslide win (70-30%) for a rodent for the Governorship in Wyoming history. Sadly, had Hunkins been the nominee in 2002, he would’ve beaten Freudenthal. He’s also no youngster, well into his 70s.
Colin Simpson drew some anger from Barbara Cubin when he openly declared in the past day or so that if he wasn’t chosen for Senator, he was going to challenge her for the House seat. That didn’t make him look too good, in my opinion, with that arrogant display if he doesn’t get his dad’s old job.