The Party can still nominate Bush if he does nothing more without officially dropping out. I won't believe he is not the Nominee unless and until he announces he is dropping out. Then I will keep my fingers crossed that there is not a "draft." Rubio is not ready for that next-in-line spot and the Party is not ready for him to be next-in-line. Christy hasn't been in there long enough. Kasich's job has been to be a stalking horse for Bush and hasn't earned his Party bones yet. Lindsey is a joke, even to the Gope.
That leaves Fiorina or Carson.
Fiorina is a woman and the gopes really are conservative in that they don't feel right about changing things that have actually changed already i.e. nominating a woman. Carson is more compatible than he sounds with his immigration and drug war views. If Bush actually drops out and tells Gope secretly (it's not real if it is public, only a tactic) that he is not going to do it, I expect the Gope will get behind Carson, reluctantly at first because he would be another tradition break, as the one to stop Trump.
I hope to get some feedback on all that. What do yall think?