I find it puzzling how the President has no problem taking on his own, as David Frum points out:

As we have seen in both the Harriet Miers fight and the Dubai ports deal, this White House's first instinct when faced with dissent in the ranks is to insult and abuse its strongest supporters. "Sexist"; "elitist"; "registered bigots" were some of the terms cast during the previous fights. Brace yourselves for much, much worse. This is no way to win friends and influence people. And triggering an internecine party conflict on the eve of a difficult and dangerous election is no way to re-elect a damaged incumbent party.