So why did Nixon look like a derelict in his last scene?
Because the Watergate scandal was spiraling out of his control and catching up to him.
I think the impression was meant to be that he was drunk off his tits - because of the Watergate scandal. "Feeling Stupid? I know I am!" - Homer J. Simpson
Well...he was a broken man.You know.Even though he seemed to mostly suck it up for his actual resignation speech.That was huge on TV, that speech...live around the world, just like an Ali-Frazier fight.