Rubio is dangerous if the meme is that he is the only viable establishment candidate. Kasich, Christie, and Bush supporters could bolt towards Rubio in an effort to stop Trump. Trump has a big lead because the establishment lane is split four ways, but it could be a nail bitter Tuesday if Rubio has late momentum.
I agree-—this is the mantra from the GOPe on Twitter, that “if only” the GOPe players all just would get behind one guy, they can “stop Trump.” No. They can stop Trump if they can all get behind one guy AND Cruz joins them.