United Kingdom Prime Minister Keir Starmer has emerged rattled but ultimately unscathed after a day and night of drama during which a key member of his Labour Party called for him to resign over revelations about a former ambassador to the US, Peter Mandelson, in the Jeffrey Epstein files.Starmer has faced more than a week of mounting pressure since the release of the latest tranche of documents from the US Department of Justice relating to the criminal cases against the late sex offender. They revealed that Mandelson had maintained a close friendship with the disgraced financier even after Epstein had pleaded guilty to solicitation of sex with a minor and was jailed in 2008.They include documents and emails that suggest Mandelson may have received payments from Epstein and passed sensitive information to him during the 2008-2009 financial crisis.Since then, Starmer has admitted that he knew of the pair’s friendship when he appointed Mandelson as ambassador but said the peer had lied about the extent of it. The affair has caused outrage in parliament. Two key members of Starmer’s inner circle have resigned and a third is under pressure to go. On Monday, Scottish Labour leader Anas Sarwar called for the prime minister to do the same.While Starmer’s position has been shored up for now by a rally of suppor …