What’s the GOPe going to do when Trump makes good on his threat to go third party?
If they can string him along until the convention then between "sore loser" clauses and the timing required I don't think Trump could get on the ballot in enough states to make a difference. Like I said, this is the "nuclear bomb" clause that would almost certainly destroy the Republican Party that the establishment says they are trying to save. But I wouldn't put it past them.
I don’t think they really care. It can be Hillary, or a brokered pick....anyone but Trump as the rest of them sleep in the same bed. Trump represents the revolution. Power to the people.