I agree that Vic has posed a question of ----Why isn't Bush speaking to the American people?
And part of the reason, IMHO, is that he knows he expends political capital when he is wrong. And instead he send out various administration spokespeople to make the orchestrated case for him. In terms of selling the Iraq war, he was sending Rummy, Rice, Powell, Cheney, Faith, Wolfowitz, Pearle, and everyone else he could muster onto talk shows to build up the hype. And even to do this day, we can rely on various administration types to keep repeating already discredited lies. On issues like swift boating of Kerry, GWB can take the moral high ground by complimenting Kerry for his military record, but GWB stops well short of denouncing the the swift boating. On the Libby issue, GWB initially promised to fire any in his administration engaged in this type of behavior, but when it was proved that Fibby had done these things, GWB got very silent, and then found it in his heart to grant Libby a limited pardon. And of course on the conduct of the Iraq war, everyone realizes the President calls the shots, yet GWB is jonney on the spot and says he listens to his generals.
Its a page right out of the play book of a master propagandist and what Mao called the tactic of using running dogs.
Of course historians will see right past these tactics and peg the blame squarely at GWB's feet.