So go ahead Bern. Be #3 and help out Trump.
He has made it very clear that if he loses the Democrat primary, then he is going to support Hitlery. Remember the argument: "both of us are much better than any of them (republicans)"?
And talking about #3, it is most likely to be Marco Rubio, or Mitt Romney. How that is going to help Trump?
The only Rubio 3rd which could happen is one funded by the Saudis backing Hillary, in order to effect a Hillary win. But that boy does not have the staying power for such a thing. Neither Rubio or Romney would ever go outside the Republican party to get elected.
Trump would because he knows what a farce they are. But he's promised not to, IIRC.