Why do the GOP think they have "Immunity" in this Election ?

Oh, kind of like Obama's "Change!" Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change Change ......Change What??????? He never does explain. And Palin would be much more qualified than "Mr Junior Worked 143 Days in Senate Senator".....