Nah, they're too busy beating each other silly to realize the only way Rubio wins is if both Trump and Cruz split the vote enough to where Rubio can win primaries with 40 percent or so of the vote.
Just heard something crazy...
“We’re hearing a rumor that Cruz and Rubio met privately today in Nevada. No word yet from campaign spokespeople.”
https://twitter.com/jacobkornbluh/status/701853282357092352
Supposedly Mike Lee set up the meet... This could be the stab in the back folks.