Several issues in play, here. If Clinton wins the presidency then the Clintons, as opposed to Obama, will head the Democratic party. It is better for Obama if a Republican wins the presidency over Hillary. Also, despite Obama’s insistence on all important issues that he learns about them the same time we do, in the news, he knows darn well when Hillary will be indicted. At that time, he will come out for the Democratic replacement. That replacement won’t be Bernie Sanders, who would lose bigger than Carter did to Reagan. If Obama steers somebody like Biden into office, then Obama can still lead or at least be the power behind the leader, of the Democratic party. That leadership is like a Russian having the keys to the warehouse.
Look for an indictment before the Democratic convention. Then, Obama will go into campaign mode for his chosen replacement. (So, there is no political involvement by Obama in the indictment process? Sure. I’ve got a bridge in Brooklyn to sell you.)
If Hillary is indicted just before the convention, Barry might make a move to have Michelle “save the party” by becoming the candidate (creating a third Obama term).