I happened to hear... via IM. Otherwise, it'd've flown right by me. I'll add some comments here I guess. I promise only to be lazy and arbitrary.
ADDED: They're all asked if they'll pledge to keep Iran from getting nuclear weapons, and they all hedge. At least three times, pushed, Hillary Clinton says she'll do "everything within my power" to keep Iran from getting nuclear weapons. In other words, I can't promise, but I'll try — subject to my view of presidential power. But there is no follow up question. Earlier, she criticized Bush for supposedly exceeding presidential power. Here's what I would ask: "When you say you'll do everything in your power, what is it that you think is beyond presidential power that you would not do, even if you thought it would prevent Iran from getting nuclear weapons?"
MORE: I spoke too soon, Richardson makes the pledge. He blathers, but initially he is clear that he's pledging.
AND: Was that lazy and arbitrary enough?