One of three things would have to happen:
1. Hillary divorces him and he is free to openly be the rogue he really is.
2. Hillary loses a presidential election or it is clear she will never be nominated, and the Clinton's political careers are effectively over.
3. Hillary becomes president, serves her term (or two) and leaves office, then the charade can end. This would suck!
Writing his book opened up a wellspring of regret and self-doubt and now that he has a website, Clinton muses on a daily basis, about all these previous battles: http://www.billclintondailydiary.blogspot.com/
How can his soul be troubled and haunted when he has none?