Most delegates are not politicians.
The way things have been going, most delegates, even many of Trump’s delegates, don’t like Trump and what he’s trying to do to their party. That could make things really interesting at the convention, even on the first ballot.
I think Trump could have corralled a lot of the unbound delegates if he hadn’t adopted his recent scorch the earth policy of calling the various caucuses examples of cheating, etc.
However, now a lot of those delegates now probably feel about Trump the way he appears to feel about them. The longer-term effect of his short-term strategy of calling “cheater” just might bite him on the butt when he goes looking for unbound delegates now.
Not elected political office holders but they certainly are political.