Just out from the National Journal: Vice President Cheney and Scooter Libby, "overruling advice from some White House political staffers and lawyers, decided to withhold crucial documents from the Senate Intelligence Committee in 2004 when the panel was investigating the use of pre-war intelligence that erroneously concluded Saddam Hussein had weapons of mass destruction."
Among the materials withheld "were Libby-authored passages in drafts of a speech that then-Secretary of State Colin L. Powell delivered to the United Nations in February 2003 to argue the Bush administration's case for war with Iraq... The withheld documents also included intelligence data that Cheney's office -- and Libby in particular -- pushed to be included in Powell's speech."