here's my amateur guess:
Cheney didnt (and wouldnt), and that's what Rove was trying to correct the press about (and zing Wilson at the same time). It was a pitch to maintain that Cheney knew nothing about any suspicion or question about the veracity of this info before using it on the public. A pitch to show that revelations from Wilsons trip didnt reach the powers- blame the CIA disfunction.
Maybe.