I'm voting for Rubio in this republican primary and hope he can pull out the nomination.
I'm confident he can defeat either democrat that gets it.
In my estimation, I look for Trump to eventually drop out.
I don't really believe the guy has the burning desire for the day to day tedious nature of being POTUS.
That's my 2 cents and about what my opinion's worth these days 
Rubio has already proven that he represents his big money donors first by breaking his campaign promise to voters that he was against a pathway to citizenship for illegals by joining up with Obama, Schumer and McCain to push the Gang of 8 Amnesty Bill on us that he helped write which gave a pathway to citizenship to illegals, the reason he did this is that is what his big donors wanted, as they want cheap labor and open borders, even though that hurts many Americans by keeping down wages for workers and hurts us all with the increased amount of crime too, but of course if you live in a gated community or even better on an island in the Pacific you dont worry about that.
Rubio is a good talker, but his words are worthless as he doesn't keep his word, unless you are a big money donor.
He would be a great used car salesman, as he can tell lies with a smile and fool many.
Read:
http://www.nationalreview.com/article/428732/marco-rubio-open-borders-money-beneficiary