According to Editor and Publisher:
Lawrence O’Donnell, the MSNBC analyst who first broke the Rove/Cooper link on Friday, wrote on the Huffington Post blog today, that Rove’s lawyer had “launched what sounds like an I – did – not – inhale defense. He told Newsweek that his client ‘never knowingly disclosed classified information.’ Knowingly.
“Not coincidentally, the word ‘knowing’ is the most important word in the controlling statute ( U.S. Code: Title 50: Section 421). To violate the law, Rove had to tell Cooper about a covert agent ‘knowing that the information disclosed so identifies such covert agent and that the United States is taking affirmative measures to conceal such covert agent’s intelligence relationship to the United States.'”