Marc Ambinder runs the rest of the primary contests -- and their associated delegate results -- out under assumptions extremely favorable to Clinton, and concludes, "so -- under these most rosy of scenarios -- since March 4, she'll have earned 520 delegates to Barack Obama's 461, having reduced his earned delegate total by about 80 -- or -- by about 60 percent -- but he'll still have a lead of approximately 100 delegates in total." It's very hard to imagine the superdelegates going against a candidate leading by 100 delegates. Very, very hard. Indeed, the most influential among them -- John Lewis, Bill Richardson, Brian Schweitzer -- are already laying the groundwork to support whichever candidate is ahead in delegates. I'm having trouble figuring out the scenario by which Clinton still wins this thing.