Rubio. If he loses Florida, I think he will drop out. That could help Cruz some, but likely helps Kasich more.
Kasich will play better in the rust belt and out west as the anti-Trup.
Cruz is an alienating figure. His folks are backing him 100% (as we see here). But you love him or hate him. He’s not a #2 pick for many, except Trump voters.
theres a problem with that theory kasich will lose ohio and michigan on the same night rubio loses florida