Ted Cruz is establishment, Joseph. He is done right now. He cannot reach 1,237 delegates. He will not win New York or any northeastern state.
Cruz and Kasich’s sole purpose is to block Trump from 1,237. Romney endorsed Kasich in Ohio to stop Trump there, then endorsed Cruz in Utah to block Trump there. This is obvious: If Cruz were an outsider, he would have rejected Mitt’s endorsement under those circumstances. He did not.
If this goes to the convention, then we are stuck with a GOP hack, Speaker Paul Ryan most likely, and we lose anyway. The time to unite behind Trump is now.