And Fox News reported a second ago that McCain knew about this before he chose her as a running mate. Not sure I believe that.
But to Barack's credit, he said this topic was "off limits."
Edit: Upon further reflection, this is really puzzling. Why in the world would McCain take on this problem if he didn't have to? (Assuming he knew, which I'm stil not convinced about.)
And, as I read somewhere else, why would Palin accept the VP nomination when she knew it would cause so much scrutiny of her young daughter?