538 looks at the polling data of these two jolts to the Obama campaign. Interestingly, the two incidents that Clinton pounced on damaged both Clinton and Obama equally - and their main effect has been to solidify Republicans behind McCain. And this makes sense: the kind of political-cultural warfare this represents is pure Rovism. It's designed to help Republicans. Which may be all that the Clintons will accomplish with this.
There comes a point at which the victims of Rove become the purveyors of Rove, in which you look from man to pig and from pig to man and cannot eventually tell the difference.