Rubio voters must be some of those undecided until the last minute OR they are coming from other establishment voters who are going with their “can win†candidate. Bush, Kasich, Christie...together total next to nothing. Their voters have switched to Rubio — just my guess.
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I think Rubio came across as the adult in the room compared to the constant Beavis and Butthead act that Trump-Cruz had become.
Cruz was very aware of the Rubio surge because he continued to target Rubio with ads through this weekend.
Definitely true that the Trump/Cruz food fight allowed Rubio to step over their bloodied bodies closer to the finish line. But Cruz was smart enough to hold him back with some negative ads in the final round. Trump seems to have forgotten about Rubio unwisely.
Where did all these gope sleepers come from tonight?
Depends on which beholder is doing the looking. To me Rubio comes across very badly -- dishonest, childish, intemperate, opportunistic. Many people agree with me and I'm sure many agree with you. I think Rubio represents the establishment vote. He is their latest "can win" against Trump and Cruz.
Rubio is definitely the "None Of The Above" candidate tonight. It's probably best not to speculate too much beyond that.