I get now why Trump called his presser even though it wasn’t held for any particular reason (no endorsement announcements). He knew all the results wouldn’t be in until much later tonite, so any victory speech would probably have been at midnite. This way Trump got to crow and claim bragging rights much earlier in the evening.
Of course, he got to eat up a big chunk of prime time on TV too with his Presser. Also, Trump got the opportunity to, and indeed did, look very Presidential in handling the questions and dealing with the Press. He looked real good, and Chris Christie is being a great right-hand man to Trump. Trump instinctively makes all the right moves.
Trump has a flair for this. Something Cruz lacks big time.