The maneuver's aggression and lack of subtlety smacks of arrogance and bully-boy tactics. John McCain has actually handled Mike Huckabee pretty well, conceding his right to remain in the race and handling him with grace and good humor. Certainly, the Obama team has more to fear from Hillary than McCain does from Huckabee, but it's remarkable to see what's supposed to be such a polished and "post-partisan" operation take out after an opponent with such vigor.
Rubbing Clinton's nose in her assorted failures isn't likely to secure Barack the desired result. It's the kind of tactic that women, in particular, dislike and could, in fact, end up creating the kind of pro-Clinton backlash that could give Hillary a rationale for fighting on.