Peter Kinder states in his letter reposted here on 24thState.com:
Without your support I cannot succeed, and I will not run if I cannot win.
I was in St. Louis this weekend, chewing the prefat at a Waffle House with an old bull of the Republican Party, and we talked about the controversy. He's not so plugged into the blogosphere, so he only had brief knowledge of the story and the important "I stopped at the pantsless bar to go to the bathroom" coda. He mentioned Kinder had a lot of money, but I countered that he might not have the votes of the non-rank-and-file Republicans.