Dummy.
Via Washington Examiner:
One thing that unites many supporters of Donald Trump and Ted Cruz is the suspicion that party elders might try to hand the Republican presidential nomination to another candidate if neither Trump nor Cruz arrives in Cleveland with the 1,237 delegates required to win.
Important voices in the conservative world have voiced such concerns. Rush Limbaugh, for one, has speculated that the Republican establishment will try to “install whoever they want” at a contested convention. (Limbaugh guessed such a final choice might be Jeb Bush or Paul Ryan.)