This was totally released at the right time to hurt Hillary's chance of being the first female president. It sounds like something that the Bush family leaked. They are really pushing for George W.'s brother, Jeb, to be the next president.
This wouldn't surprise me at all. Maybe they think yet another Bush in charge is the natural order of things. I don't think it will seriously impact Hillary though, she's already shown she can behave with dignity in the face of scandal and she's sure to secure the feminist vote.