Alastair Campbell
He used to work for the Daily Mirror as their politics reporter, and was an alcoholic. Then he had a breakdown, gave up drinking, and started working for Tony Blair in 1994. He was seen as one of the main spin doctors in the Labour Party. He eventually resigned over the 45 minute claim in the dossier prepared over the Iraq War, after the Hutton report had come out and Dr. David Kelly was dead.