Well, Newt paid dearly for that, and has since come home to the reservation. Even before he was a candidate, he admitted that he made some boneheaded calls, and owned up to them.
Had he not done so, there is no way on earth I'd be supporting him right now.
So will it be with Rubio. Especially, in this case, Rubio didn’t even endorse Romney the way Newt did to Dede.