Depends on how Obama does, especially in Oregon. If he is comfortably ahead--even factoring in a sizable trove for her in Puerto Rico-- so that he can offer her the FL and MI delegates she "won" and still be ahead in delegates himself, I suspect strongly he will make that offer--either in exchange for her dropping out, or to impress the undecided superdelegates of his strong desire to unite the party. And if he does, it will. And thereby bring many superdelegates over to his side.

I can't claim this idea--but it makes a lot of sense.