What is your point? That he should know how these people will react once elected?
Please.
His primary goal was to be re-elected. he extended his coattails to help others reach re-election hoping we'd pick up enough to accomplish his agenda. He succeeded in his plan.
The reason they do this is because they see McCain successfully manage re-election while stabbing his party in the back. They see Frist unable or unwilling to discipline them. They see the base tolerate it at election day.
If Frist starts punishing them and we start voting them out, problem will be solved.
So how do you think that's working out so far?