McCain is taking a lot of heat from left blogs for what they call "scoffing" at health-of-the-mother exceptions to bans on late-term abortions. I think we can afford to be fair to McCain given that he's going to lose - he's talking about mental health exceptions that could be so broad as to make the exception swallow the rule.
To be fair to Obama, though, he says he opposes a broad definition of mental health, and implies that clinically-defined mental health disease should be the litmus test. For voters who think that a late-term fetus is/may be a person, I doubt this balances out well, but that's a messier issue regarding abortion.
A tangent - I wrote in February that I thought Obama would win the nomination because "people tended to like Obama more as they heard him more and got used to him as presidential material." I thought that was clear for the Democratic voters, and voter reactions to the presidential debates seem to show the same on the national election level.