"We couldn't let that guy win. He says terrible things. You understand why we had to cheat, don't you?"
No, Carson, and Cruz are just spliters who would have been destroyed by Jeb/Walker/Rubio.
See sundance’s work on the subject. Trump has a broad cross-section of appeal similar to an establishment candidate’s. Cruz and Carson are mostly religious voters, similar to huckabee/santorum’s bases before.