I have always thought he would drop out of the race. I still believe he wants to "win" but he doesn't really want to be President. Even he knows he can't do the job which IMO is why he does and says some of the outrageous things he says and does.
I believe he will either be forcefully replaced or he will drop out of the race for some ridiculous reason. He will always be able to say that he won enough delegates to be the nominee and he will think that he "could have" beaten Hillary Clinton.
IMO he wants Chris Christie to get the nomination. Not sure if the rest of the party wants that though.
Take care of all of your memories, for you cannot relive them - Bob Dylan