George W. Bush is a lucky guy. He will never be a tragic figure.
A tragic figure is a man who is brought down by some fatal flaw in his own character, and no matter how roundly George W. Bush and his benighted administration may be condemned by history, he will not be brought down, for there is no anguish. His conscience and his sense of his own rectitude remain unshaken.
George Bush has probably never lain awake one night in his life second-guessing a decision he made. This is the advantage of leading "from the gut," rather than by reason.
Gut leadership is strong, swift, sure. Reasoning is more deliberate, and can easily be read as tentative by an electorate that demands immediate action.
George Bush is probably not lying when he says his administration never approved torture. He may be horribly wrong, but he believes he is telling the truth. He has effectively, and enviably, insulated himself from the consequences of his decisions.
If only the rest of us could.