Sen. Jay Rockefeller (D-WV) knew of Bush's domestic spying, but was not allowed to even tell his staff that the President of the United States was breaking the law.
In July 2003, Sen. Rockefeller wrote a hand-written letter to Darth Vader (a.k.a. Dick Cheney) expressing concern over the spy program.
(Joshua Marshall's Talking Points Memo is on the case!! Great job!)