An excerpt from the National Journal piece:

"Vice President Dick Cheney's former chief of staff, I. Lewis (Scooter) Libby, testified to a federal grand jury that he had been "authorized" by Cheney and other White House "superiors" in the summer of 2003 to disclose classified information to journalists to defend the Bush administration's use of prewar intelligence in making the case to go to war with Iraq, according to attorneys familiar with the matter, and to court records.


According to sources with firsthand knowledge, Cheney authorized Libby to release additional classified information, including details of the NIE, to defend the administration's use of prewar intelligence in making the case for war.

Libby specifically claimed that in one instance he had been authorized to divulge portions of a then-still highly classified National Intelligence Estimate regarding Saddam Hussein's purported efforts to develop nuclear weapons, according to correspondence recently filed in federal court by special prosecutor Patrick J. Fitzgerald.

Beyond what was stated in the court paper, say people with firsthand knowledge of the matter, Libby also indicated what he will offer as a broad defense during his upcoming criminal trial: that Vice President Cheney and other senior Bush administration officials had earlier encouraged and authorized him to share classified information with journalists to build public support for going to war. Later, after the war began in 2003, Cheney authorized Libby to release additional classified information, including details of the NIE, to defend the administration's use of prewar intelligence in making the case for war.

Libby testified to the grand jury that he had been authorized to share parts of the NIE with journalists in the summer of 2003 as part of an effort to rebut charges then being made by former U.S. Ambassador Joseph Wilson that the Bush administration had misrepresented intelligence information to make a public case for war.

Wilson had been sent on a CIA-sponsored mission to investigate allegations that the African nation of Niger had sold uranium to Iraq to develop a nuclear weapon. Despite the fact that Wilson reported back that the information was most likely baseless, it was still used in the President's 2003 State of the Union speech to make the case for war. ...