If they do, they're not only going to get a bunch of media coverage for breaking tradition and outside the box thinking (and ALL coverage is good coverage during primaries as Trump shows), but they'd probably build the momentum. I think the hard part would be the negotiation between the camps as to who gets to be at the top of the ticket. Kasich's camp genuinely believes he's better positioned than Rubio.

Personally, I think Rubio is the higher skilled politician, and probably better debater, but Kasich is the more credentialed executive. Tough call... If they could just settle this like men and flip a coin, they'd probably be in the White House come January ... if you believe the current polls (in which they both beat HRC).