As long as it is straight 'answer your questions and then be quiet', I think Priebus will let it go - he hardly wants to punish the only woman, or the only black. If candidates are given time to offer a rebuttal to the other candidates statements though, then it's punishment time. Banning candidates from sanctioned debates has been discussed, along with taking away a third of a candidate's pledged delegates should they reach the convention.
Well, can Priebus afford to offend the NH Union Leader? It's a powerful NH newspaper.