Americans deserve to know about a presidential prospect's health, and questions about experience and integrity are, of course, legitimate areas of inquiry. But to imply that Hillary -- or any candidate -- should be discounted based on advancing age goes too far. Age is an asset; it's no disqualifier.
When I was younger and felt, as I often did, that I had been the victim of some injustice, my father used to tell me a parable. He would start telling it, and I would roll my eyes. Because I'd heard it before, and teenagers often roll their eyes. But I also liked the story, and I always enjoyed my father telling it. So I listened.