Correction. Bill Clinton was a believable liar. Kerry can't pull it off, which is why he's still behind in the polls.
With any hope, he'll also be behind bars.
I think also that he was clever enough to know that he didn't have to pander to the liberal base in order to get its support. With them it was wink wink, nudge nudge; watch me sucker these moderates into thinking I'm one of them, but we know what the score is, eh?