I guess that little mini-Mike is committed to staying in the race. He believes that even if Biden is moderately successful against Bernie, he is incapable of holding it together through the nominating process.
For me, the larger question is what the little man is going to do once he looses (against either Trump or Sanders)? How does a man that has billions of disposable dollars occupy his time once he is no longer engaged in spending unlimited amounts portraying himself as a savior for the nation? I don’t think that he is going to go quietly into the night later this summer or fall and we can expect to have another Soros fanning the flames of discontent.