United States v. Libby was the federal trial of I. Lewis "Scooter" Libby, a former high-ranking official in the George W. Bush administration, for interfering with special prosecutor Patrick Fitzgerald's criminal investigation of the Plame affair. Libby served as Assistant to the President under George W. Bush and Chief of Staff to the Vice President of the United States and Assistant to the Vice President for National Security Affairs under Dick Cheney from 2001 to 2005. Libby resigned from his government positions hours after his indictment on October 28, 2005.