An article in the New York Times this morning highlights the closeness between former president Bill Clinton and both current and former presidents Bush. The two-somes or three-somes can be seen at public events or enjoying one another privately. In fact, in a recent TV interview, W postulated that if Hillary were to run in 2008 and win, the presidents in order would read "Bush, Clinton, Bush, Clinton".
In fact, when asked about her chances, W called her "formidable".
I read Bill Clinton's "My Life" biography over the last few months (off and on - it's not that I read slow), and through the book, gained more admiration of Hillary, her background and strengths. Surely, it's a husband discussing his wife, or a sly political move, but I came away with significant respect of her roots and ambitions. Hillary is a very intelligent, focused individual with high expectations for herself. If she doesn't get smeared and slammed by a right-wing PR machine, it'd be very interesting to see if she gives 2008 a shot.
And... go buy the book. I really enjoyed it.