If Miller's source is an active CIA Agent, could she be afraid of being charged (despite claims she is free to name her source)with exactly the crime that Rove is being accused of?
I don't think so...the law doesn't apply to the RECIPIENT of the information. Unless they disseminate it to another, putting them in legal jeopardy.
I think NOVAK got the CIA leak. I think Miller put it together after learning of Kristof's breakfast meeting.