Bachmann is a politician. Cain is not. I believe that is the biggest reason Cain is doing this.
Real conservatives and people who believe in the Constitution are sick and tired of politicians and do not trust Bachmann because of this. They do not trust her or any other politician to get down and dirty to do the right thing when the time comes to stand their ground. No compromises.
The "house" needs to be swept clean and Cain is just the person to do the job.
“sick and tired of politicians.” Nail struck square on the head! Go Cain!