LONDON (AP) — A year ago, Peter Mandelson was Britain’s ambassador to Washington, the latest high-profile post in a rocky but consequential political career. Friendship with Jeffrey Epstein cost him that job. Now, after new revelations, Mandelson — like other powerful men including King Charles III’s brother Andrew Mountbatten-Windsor — is facing demands he come clean about his relationship with the late sex offender. Mandelson resigned from the governing Labour Party on Sunday following new