For defamation of character
while I think his comments where sleazy (since they where presented without evidence, if he shows some proof thats another story), I saw the speach the quotes where taken from. it was quite clear in the speach (not so much, where he was quoted in the article) that these where his opinions.
all alegations where preceded with "it is my belief", or a simular statement. no grounds for a law suit IMO, I believe you are still allowed to believe anything you want, or even express these beliefs as long as you make it clear it's your opinion. in order to prove he was lying, you'd have to prove that he didn't believe it, not that the beliefs where wrong.