British Prime Minister Keir Starmer is fighting for political survival after fresh revelations about Jeffrey Epstein’s network reignited scrutiny of a decision that now threatens to define his premiership.

Starmer never met the disgraced financier, but his judgment is under intense pressure after appointing Peter Mandelson as Britain’s ambassador to Washington despite Mandelson’s long-standing ties to Epstein. Those ties, downplayed at the time, have been laid bare by newly released U.S. Justice Department documents that have plunged the Labour government into its deepest crisis since taking power.

The controversy has already claimed high-profile casualties. Epstein’s connections previously helped topple Prince Andrew and now Mandelson, a veteran Labour powerbroker, has been fired and placed under police investigation. Critics say Starmer’s role in elevating him could be the mistake that ends his time in office.

On Thursday, Starmer offered a public apology to Epstein’s victims, acknowledging that Mandelson had repeatedly misled him.

“I am sorry, sorry for what was done to you, sorry that so many people with power failed you,” Starmer said. “Sorry for having believed Mandelson’s lies and appointed him.”