There were no weapons of mass destruction in Iraq. But he still says so. There was no link between Saddam Hussein and al Qaida. But he still says so. And thus, gripping firmly these figments of his own imagination, Mr. Cheney lives on, in defiance, and spreads - around him and before him - darkness, like some contagion of fear. They are never wrong, and they never regret - admirable in a French torch singer, cataclysmic in an American leader.