The Peter Mandelson Epstein files emails is the biggest scandal of Keir Starmer's time as Prime Minister, but is it the one to finish him off?The PM admits Peter Mandelson's ongoing relationship with paedophile financier Jeffrey Epstein came up as part of the vetting process to appoint the disgraced peer as the UK's man in Washington, but he says Mandelson 'lied and lied again’, adding, ‘he betrayed our country and our party’.The government's invective shows their determination to distance themselves from the scandal but the stench of sleaze and corruption hangs heavy over the Labour government because of Mandelson - the man Keir Starmer was praising less than a year ago.Could it be the final straw for the Prime Minister's restless backbenchers?On this episode of The Fourcast, Krishnan Guru-Murthy was joined by Starmer biographer Tom Baldwin, the political commentator Zoe Williams and pollster and strategist Scarlett Maguire.