Charles Barkley pulls no punches, but he advocates beating your child. In 2014. I wouldn't vote for him for president of the NAACP, much less president of the USA.
I would nominate Sam Harris. As a PHD in neuroscience, he'd be smarter than our current president, or the previous one (who wasn't even as smart as me). As an atheist, he'd be a champion of scientific, logical, enlightened progressive thinking, rather than dictated or influenced by fairly tales from thousands of years ago. And he might have the balls to stand up to other foreign governments who are (exponentially more so) plagued by the same problem.
Given the religiousness of America, I'm sure my nomination would go nowhere. In that case, I'll nominate Bruce Springsteen because he is for the little guy and is a working class hero.