I think that she's been running on fumes for the last 2 months. She was hoping for a major stumble by Obama, and there have been some obvious ones, but not enough to deflect the arrow in another direction. And, it was inevitable that in her aggressive run at Obama, that she or Bill would make some mistakes on her own, which proved to be just enough to offset Obama's. Well, I'm glad it's over. Her campaign's surge of fundraising has petered out, she's exhausted and discouraged, and the superdels will be flocking to Obama in the next week. At this point, an aggressive resurgence on her part would further inset her picture to the definition of futility and damage her future Senatorial and presidential aspirations. She has everything to gain and nothing to lose by callilng it quits now.