Yep - those who claim the unions will make or break this election are hoping for a contested or brokered convention because they would rather be willing victims of the same sort of treachery committed against Mississippi and lose than have an honest winner.
As Cruz appears willing to be Kasich's helpmate in the endeavor to stop trump instead of supporting the will of the People, it looks like Rubio has more class by just getting out of the way. If Cruz wants what the people want, he will end up going all-in for Trump instead of trying to massage his own ego as he decides, "unilaterally" (Kasich and a whole mess of others are helping, but he can make the deciding decision to do the right thing by himself), what the People really want and need.
More Republicans have voted for someone else than have voted for Trump.