I suspect that Rubio keep his job. Things are good in Florida so the Trumpists are likely to win. Its a long time till elections and all sorts of things can change all of that. I continue to think that, eventually folks will figure out that Trump is a self serving loser and virtually anything he comes into contact with tends to rot (a book just came out which claims that Trump has been able to corrupt the entire secret service!). Trump rot includes people, business, etc (just about everything).
My problem is that the true believers keep on thanking Trump for all the wonderful things he has done for them. I have no idea what they are talking about. I do know that Dems might have a chance - if they don't screw it up.