You will want to go to Sabato's Crystal Ball for the rather comprehensive commentary not included in this post. . Delegate count is included in these charts. The winning number is 1144. First candidate accumulating that total, becomes the GOP presidential representative. If that does not happen before the National Republican Convention, at the end of August, the convention will be termed "a brokered convention." At such a gathering, after the first round of voting, the delegates are free to vote for whomever, whether previously announced or not.
(I don't know about you all, but this business of fighting off the commie hordes is really getting nerve raking.)