According to Cooper's email, Rove did leak classified information, wittingly or not. Did he share that fact with Bush? If McClellan can be believed, Rove did not. If that's true, Bush should dismiss Rove for holding out on him. But it Rove did talk to Bush about his participation in the leak, what did he tell Bush? And what actions did Bush take? Did Rove tell Bush how he had come to know about Valerie Wilson's position at the CIA? Did he disclose to Bush who else knew about it? Did he tell his boss whether anyone else was passing this information to reporters? In the first column that disclosed Valerie Wilson's CIA identity, Bob Novak referred to "two" senior administration officials? So who in addition to Rove might have revealed this information to Novak?
Bush also said at the time that any government official with knowledge of the leak should "come forward and speak out." Rove certainly did not follow that presidential order. He should be pink-slipped for that, too.
Of course, if Rove did tell Bush and Fitzgerald knows it, then that give Fitzgerald something to waltz down to the House Judiciary Committee.
And if Rove stays on much longer when it is so clear that he outed a CIA operative, knowingly or not, that gives the House something it ought to consider even without any prompting from Mr. Fitzgerald.