What gives is Obama knows Hillary is a manipulative low life. He doesn't have to respond to her at all, and he should completely ignore her. They have had 21 or 22 debates at which time every thing that needed to be said, has been said.
From this point on, these candidates should hone in on what they plan on doing for the country, not what the other one is not qualified to do. It's up to us to decide who is qualified and who is not qualified. Right now, I want to hear some concrete game plans on how they plan on resolving the economic crises, the energy crises, the Iranian, Iraqi, and Afghanistan crises. Less bullshiit about who is qualified, because as far as I'm concerned, they are both at the starting gate !