You say rehabilitate. I say corral. My word is much more limited; yours is way more optimistic.
He doesn’t need to be rehabilitated to be controlled. I think he is subject to control, for many reasons.
Oh please, if you actually think McCain will return her favors you are nuts. He specializes in stabbing people in the back. Notice how "his people" attacked Sarah and he just had no control over anything they did. No, he can't be controlled or corraled. He will stab Sarah in the back just has he has been stabbing republicans in the back for decades.
If Sarah believes otherwise, then perhaps Tina Fey was doing a better impression of Sarah than any of us realized.