Carol, I know you're now out of the DC loop, but the Kennedy story has just hit and appears to be big. Bushes excesses were known years before he ever ran for office. He also never lied about them.
Clinton lied and lied and lied, and some of his worse ones weren't discovered until after he left office.
Kennedy's were mostly hidden, due to the aforementioned liberal media's attachment to him, and are only now coming out after some forty years.
I also suspect that, since Bushes excesses in all areas were freely acknowledged, and his behavior since has been well beyond reproach (he doesn't drink at all since about 1970) etc, I would have to say that due to the incredible amount of lying done by Clinton, and by Kennedy(s), there is no contest in the moral tone contest. And I have a feeling the Nation feels pretty much the same way. They may understand the frailties of human nature, but they also understand being snookered...