They write notes!! (TM: Atrios)
Here's the notes Cheney wrote to McClellan to lie to the press corps about Scooter, just like he did for Karl Rove. Wow!
From Kevin Drum:
So who was it that asked Libby to take the lead in talking to the press about Joe Wilson's trip to Niger? Apparently it was "this Pres," but immediately after writing this Cheney decided the passive voice was a better bet. Even in a note to McClellan, it was best not to admit that Bush had ever been involved. Plausible deniability, you see.