Morgan McSweeney

British Prime Minister Keir Starmer was plunged into his most serious political crisis since taking office after his chief of staff, Morgan McSweeney, resigned on Sunday, accepting responsibility for advising the prime minister to appoint Labour veteran Peter Mandelson as ambassador to the United States despite his past links to disgraced financier Jeffrey Epstein.

McSweeney’s departure follows the release of U.S. court files that detailed the extent of Mandelson’s interactions with Epstein, the late sex offender whose network of powerful associates has continued to reverberate through global politics. The disclosures have triggered a police investigation in Britain and intensified scrutiny …