Really?
Edwards and Obama are, frankly, not very bright. Hillary is smarter, but is completely without a set of fixed principles. Fortunately for her, many of her fans seem to regard consistency or integrity as an unimportant factor.
Was the debate you watched the one moderated by George Stephanopoulis? No conflicts there...
Just a reminder:
Bush isn't running in 2008
And in my never-humble opinion, although each of the leading Republican hopefuls has positions I have problems with, there isn't a one of them who doesn't crap bigger than the entire Democratic front line combined.