Edwards is now totally irrelevant as a candidate for anything. That is unfortunate, but that is how it works.
Cain won't ever be a nominee for president, nor is he likely to come close.
Edwards is irrelevant because of his character flaws; unlike Reagan who obviously was much more intelligent. I'm happy Edwards, the idiot, was never elected POTUS. His stupidity is not exactly on par with people like Obama, Bill Clinton and Harry Reid all if which are far more conniving. Not to say they are much smarter though. All of them have done similar stupid things they just have better timing.