one cannot discount the possibility that Rubio got in to pull votes from Cruz as a favor to his mentor Jeb,
And be his VP nod.
It sounds like Rubio is committed not to run for Senate re-election. That’s a lot to give up for an assist. I think he’s in it to win it. I am starting to wonder if it’s the other way around. Bush never takes off and supports Rubio. We’ll see. At this stage I am for Walker or Cruz...whichever shows me more during the campaign.
Bingo, that is his real purpose, as a blocker for Bush.