"I really don’t care. That's not up to me — that's up to them," Mr. Trump said on "Fox and Friends." "They signed a very, very strong pledge, and they signed it because they wanted me to sign it." . . "But Kasich isn’t on board, and the only reason he's not on board is that he got beaten so badly. He got beaten as badly as anybody can get beaten," he said. "I don’t mind it. If Kasich doesn’t endorse me that's fine," he said. "But I will say this: He and Bush and all of these people signed...