Fling, thanks for your scientific description of approximately one half of the voting citizenry. "Approximately," being the key thought. Could be 49.99%. Could be 50.01%. The former, you got Mitt. The latter, you got Barry.
There is however, another species even stranger than the blithering idiot American voter worthy of your study. That unknown %-age of the citizenry that is not voting. The ἰδιώτης That's a guy in ancient Athens who was too stupid to register to vote or "didn't care about" politics. Could there be enough of these creatures to put our camp up over 50%? Although we could use'em, do we want'em? How do we go get'em? How do we round'em up and make'em vote right?
That was just on the tip of my tongue. Around here we call them 'stulti'.