On paper there are a little over 50 delegates here in PA that are technically unbound. However, on our ballot we get to vote for the statewide candidate we want, and then a delegate for our district.
Most delegates have pledged to vote in the convention the way their district has voted. So if Trump wins my district, chances are the delegate will also vote for him on the first ballot.
Also, there are certain delegates who are openly Trump supporters, so we can vote for them on the ballot.
My point being, hopefully PA will give a large representation to Trump, since he is at 48% in the state polls at this point, so he will technically get more support than just the 17 bound delegates given to the state winner.
In fact, Trumps chances of getting to 1237 may come down to how our PA unbound delegates end up voting...
The unbound are party regulars so would slant GOPe/Cruz. Might have a few real Trump supporters among them. Those PA "unbound" are bound for the first ballot.
Thanks for the explanation and lets keep our fingers crossed...for Trump
Very very unlikely Trump gets 1237, but yes if he does it will require unbound delegates (wherever they may be) voting for him to end it on round 1. It *could* happen, but based on Trumps ability to play the delegate game it looks like most of them will be Cruz votes.