If Rubio's star continues to fade, it will come down to Trump vs. Cruz as it should. The GOPe choices will boil down to (a)backing Cruz and thinking they can control him with money, (b)backing Trump and thinking he will revert to the Romneyesque positions he held last election cycle, (c)subtle sabotage to elect Hillary Clinton which may not work with the number of blue collar Democrats who Trump may win over.
I'm betting on (c) with a remote possibility of (b). Least likely is (a).
We shall see indeed.
Trump will run the table in February in a total blow out.
He will then fillet Hillary. How delicious.