Lawyers for Lewis "Scooter" Libby are preparing a last-ditch effort to delay the former US White House aide's two-and-a-half-year prison sentence.

Former White House aide Lewis "Scooter" Libby was sentenced to 30 months in prison today for lying and obstructing the CIA leak investigation.

Former White House aide Lewis "Scooter" Libby has been sentenced to 30 months in prison for perjury and obstruction of justice in the CIA leak case.

Three of Bill Clinton's White House aides will be subpoenaed over Marc Rich's pardon.