Since Guiliani, McCain and Romney immediately distanced themselves from Coulter's remark, the politics of the issue are to divide Republicans which works to the advantage of the Democrats.
Ann is smarter than that as a political operative.
I doubt anyone expects these politicians to endorse what Ann said. However, they know Ann's sarcastic humor as well as we do, and they know she is a defender and supporter of the conservative cause.
They are smart enough to know that she uses sarcasm along with her high public profile to expose the hypocrisy of the left, thus providing an opportunity for politicians like them to confront the issues more tactfully. They are also smart enough to know how to parry the left's predictable false, and politically expedient, interpretation of Ann's remarks without condoning the usage of the word - if not, they are certainly smart enough to figure out how to do it. The fact that they did not take advantage of the opportunity, thus appearing to join in the left's condemnation of Ann bothers me more than what Ann said.
IOW, she's callin' 'em out, and has nothing to lose. Good point. What are the leftists going to do now, stop liking her?