In my opinion, Marco Rubio is one of them.
If Newt Gingrich is going to beat Obama, he will need their support. Calling them "traitors" and "RINO"s and throwing them under the bus is a suicidal move.
If Marco wants conservatives, the tea party, and Newt Gingrich’s support he should not have endorsed Romney and started attacking Gingrich.
Of course you go to bat for Mitt and his backing, but conservatives do not.