Also, B) Who owned Congress during those years? Having the presidency but not being able (or even willing to try?) to do anything with it because one or both Houses blocks you is also pretty much "having your ass handed to you", and I seem to recall which party's Presidents have been in that situation and which party's haven't.

And, C) Being popular enough to win both Presidency and Congress might perhaps have a little something to do with having popular policies after all, donchathink?

No fucking wonder the Democrats have lost Congress seemingly forever, when their Congressmen are to all intents and porpoises indistinguishable from (most; the old just-Jesus-and-plutocracy kind) Republicans. (Though, admittedly, usually not the newfangled totally-out-of-their-gourd ones.)