Why are you fat?

Barbara Walters asks Chris Christie.

He doesn't know why, and if he could figure out why, he'd fix it. Then he says it doesn't mean he's not capable of serving as President. But, come on, when you're President, all the world's problems are yours, and you'd better be good at figuring out what's wrong. These problems are much more complicated than why he's fat! He not just a bit chubby. He's very fat. Whatever the subtleties of why people get fat, a good percentage of what he's carting around has got to be from just plain gorging himself. How can he sit there with a straight, sincere face and say "If I could figure out why, I'd fix it"? At least we have video showing us how he looks when he's lying.