Cruz is ignoring Todd’s implication that Trump has the nomination won and using the free airtime he has to attack Trump. Even if he does not get the nomination, he knows that he has a large block of delegates who favor him and do not like Trump. If he manages to do well in Indiana and his supporters do not abandon him. (He will know before the press does), if he can end up in thew same place where, say. Bob Taft was after losing to Ike, then he carries away something for the future. Trumps needs conservatives to win. If he does, and disappoints, than Cruz will exploit whatever advantages he has. He would not be alone in case Trump disappoints by losing or failing his followers in office. Lots of young guys in the Republican party.