No, he let his surrogates and disruptors in the "netroots" do his talking for him.

Hey, it was a strategy and though I disagree with it, it worked for him in the short term.  But instead of recovering, his campaign continues to stumble along when it comes to Clinton voters, underestimating how much abuse they would take.

Not surprising, given Obama's lack of experience and sharp elbow-style politics.  Works ok in Chicago but in a national election its a failure.

A few mea culpas from Obama's surrogates and henchpersons would go very far in helping Obama raise money and win the election.