Because Sam is an intelligent and rational individual.
If Clinton wins, the Repubs will go into a tailspin and introspect, if Trump were to win, Repubs and Dems will have to both look inwardly to figure out how their machinery failed so miserably in the face of a hack -a blowhard with no political experience who will say anything to win and who likely, if elected would make Taft look like a good executive.
Democrats and Republicans are already, and will continue, to investigate the failure of their machine. That much is true regardless. It's whether or not we're still here to do that introspection that I'd prefer to save.
Sometimes things need to get worse before they can get better.