Back in '75, the people were mightily burned out over Nixon, completely unimpressed with Ford, who took the position that he was only a caretaker, and little enthused with the peanut farmer who used to be a nu-cue-ler engineer. The joke went around that all the candidates were unimpressive, so why couldn't we try it without a president once and see if it turned out any better. So we did.
It didn't work out well, and the new joke was that we'd do better picking someone at random out of the phone book. This year, I think we did.