Your problem is that Jeb Bush has not and likely will not ever endorse Trump even thou he signed a pledge to do just that should Trump be the GOP nominee. However just about the entire R wing of the uniparty has endorsed Cruz. Cruz also has the backing of the GOPe donor class. Ted Cruz is the GOPe NWO globalist candidate. Trump is the anti-establishment pro USA candidate. Your what ifs are a fantasy at this point in time.
Ok, thank you for explaining that you fear that Bush and the establishment Republicans might endorse Trump and openly back him for president.