The latest revelations around Peter Mandelson and Jeffrey Epstein are far from the first scandal to engulf him.
In fact, Lord Mandelson has been involved in a series of scandals, dating back to his time as a cabinet minister in the New Labour governments.
Known as the prince of darkness, he was famed for his mastery of the art of spin.
Lord Mandelson, at the time Labour MP for Hartlepool, was first forced to resign his cabinet job of trade and industry secretary in 1998 after failing to disclose a loan for a home from Labour millionaire Geoffrey Robinson to his building society.
He returned to cabinet the following year as Northern Ireland secretary - but was forced to resign again in 2001 over claims he helped businessman Srichand Hinduja with an application for a UK passport.
He was cleared of any wrongdoing two months later - but it was too late to save his cabinet job.
He quit the Commons - and the UK - in 2004 to work for the EU - where he was accused of inappropriate links to various businessmen, including claims he accepted hospitality on a Russian oligarch's £80m yacht.
At the time, Mandelson denied giving or receiving any favours in return.
When his term as EU commissioner ended, he returned to the UK - and was put into the Lords by Gordon Brown, to become business secretary and de-facto deputy prime minister.
It's this period where Lord Mandelson is alleged to have leaked sensitive information to Jeffrey Epstein.
After Labour left government, he left frontline politics - until he started offering Sir Keir Starmer advice in the run up to the 2024 General Election.
After winning the election, Starmer appointed Mandelson as the UK's ambassador to the US in late 2024.
He was sacked as ambassador in September when more details over his relationship to Epstein came to light.
It's this history that Labour's political opponents are using to question Starmer's judgement - and that of his chief of staff, Morgan McSweeny.