How many "Trump delegates" do you really think there are? After a first ballot, when they are free to vote as they see fit?
Very, very few, I imagine. Trump hasn't built the relationships and didn't even try to get his own loyal supporters selected as delegates in the states.
True, he won’t have the number of delegates as Reagan had in ‘76, but here on Georgia, Trum has enough to make a showing at the state and dist. Conventions, probably better in the NE. Cruz has done a good job getting his people to show up. Between the two, I don’t see a groundswell for a Romney or John Ellis Bush strategy.