You know what they say about assumptions...
So, having posted the disclaimer...
If in fact those three are in effect in a virtual three way tie, sure...two tag-teaming the other out...while somewhat uncouth and craven...would be within the rules but I don't think it is fair to say the person being tossed aside (whoever it may be) or their supporters have no cause to bitch. But who is to say Cruz picks Rubio (I see that as doubtful)...what if it is Rubio picking Cruz (I see that as doubtful too)...or what if it is Trump choosing one of the other two? I could see him taking Rubio, after all if certain pundits are correct and Trump is a closet Dem or no better than a stealth Establishment operative...Rubio makes more sense than Cruz, right?
More twists? OK, how about if Trump is clearly ahead, but 100-200 delegates short of sewing it up...what if he gets a third tier candidate like Kasich who inexplicably is saying he is in it to the end and gets his delegates for the VP slot...how would that go over?
Also, we are talking about delegates...people...once in a convention and all this horse-trading goes on...how many are going to be able to stick with their choice if their candidate sells out to someone they cannot stomach?
Plus, just to be pest...how about all the other years where the poohbahs come forth and announced "it is time to get behind the leader and get on to the general election without any more internal bloodshed"...that is what stuck us with flawed candidates in the past...the old rally-around-the-establishment game...what happened to that? Oh, yeah...it works only for certain types...
I think a train-wreck is almost a sure thing...the establishment will wreak havoc upon the GOP and nothing can stop it...