NO WAY!! There's no reason to drop out. Cruz still has a shot at this, especially if he picks up pretty much all of the not-Trump delegates. And in any case, the more delegates he has, the more leverage he will have, as the only social and constitutional conservative in the race.
Amen to that. And the supporters of He Himself the "great negotiator" should know that some negotiation may be necessary to get over that 1,237 threshold.