Who leaked?

It seems that the case of the leaking of the name of the agent in the CIA to retaliate against former ambassador Wilson, who had the nerve to criticize Bush's claim that Nigeria provided nuclear material to Saddam ... the agent happened to be Wilson's wife, and the leak could have put her life in danger. Wilson says he knows who it is. Bush might also, and hope it just goes away. The culprit's name may be K.R.