Rep. Todd Akin, US Rep from District 2 (my representative) and conservative http://www.akin.org/
John Brunner, St. Louis businessman who has never run for political office before http://johnbrunner.com/ and
Sarah Steelman, former State Senator and State Treasurer http://www.sarahsteelman.com/
Any of these three could beat McCaskill. In this age of "identity politics," Sarah has an advantage as a female, but she is my personal third choice. (Her husband, David, is a trial lawyer and until she began running for US Senate, she opposed tort reform; I don't trust her.) Although Todd is a current federal rep (and despite the fact that he's my current representative), I prefer him over Brunner because he knows "how to play the political game." I understand the "throw the bums out" attitude, but I also believe we need some people who have experience in the political "sausage-making" process."
I will support whomever wins the August 7 primary. Missouri Freepers, get involved in this race. We MUST get rid of Claire McCaskill!
Good charta at the WIKI link. The analysis that follows leans a bit