Just for the record, I don't think DoMA was either Clinton's or his party's best moment; it was anti-gay in intent, its entire reason for being was the progress that gays were making towards marriage. Nevertheless, the Democrats seem to define themselves a lot less by their anti-gay strategy than the Republicans do by theirs. I think of the partisan hounding of Clinton for example - - the guy almost driven from office by a fucking blow-job. Sure, SOME of the critics were Democrats - - the egregious Lieberman comes instantly to mind - - but most of the fake-puritanical outrage seemed to be coming only from one side of the aisle. I think of the way the Republicans took control of the "family values" label and made it a part of their brand. And of course I think of the Constitutional Amendment campaign, a disgrace to democratic values and principles.
For all of the foregoing reasons, I think that a Republican caught by scandal is a perfect example of hypocrisy unmasked, whereas a Democrat in the same circumstances is usually just political road-kill - - unless it's a guy like Lieberman, who made a point of parading his sanctimony for all the world to see.