Jonathan Alter writes in Newsweek about "Hillary's Math Problem":
Forget tonight. She could win 16 straight and still lose.
So no matter how you cut it, Obama will almost certainly end the primaries with a pledged-delegate lead, courtesy of all those landslides in February. Hillary would then have to convince the uncommitted superdelegates to reverse the will of the people. Even coming off a big Hillary winning streak, few if any superdelegates will be inclined to do so. For politicians to upend what the voters have decided might be a tad, well, suicidal.
For all of those who have been trashing me for saying this thing is over, please feel free to do your own math. Give Hillary 75 percent in Kentucky and Indiana. Give her a blowout in Oregon. You will still have a hard time getting her through the process with a pledged-delegate lead.
The Clintonites can spin to their heart's content about how Obama can't carry any large states besides Illinois. How he can't close the deal. How they've got the Big Mo now.