Starmer admits poor judgment in Mandelson appointment amid resignation calls

Prime Minister Keir Starmer admitted to poor judgment in appointing Peter Mandelson as Ambassador to Washington. The market on Starmer out by December 31, 2026, is at 64.5% YES.

Starmer’s acknowledgment comes amid mounting pressure for his resignation. The June 30, 2026 market sits at 36% YES, unchanged from 24 hours ago but up from 18% a week ago. The December 31, 2026 market is at 64.5% YES, a level that prices in serious doubt about Starmer’s ability to hold on.

The term structure shows a 28-point jump between the June 30 and December 31, 2026 contracts, which means traders expect a forcing event in the second half of the year. The scandal around Mandelson’s failed security vetting and undisclosed ties to Jeffrey Epstein has intensified calls for Starmer’s resignation and is driving this gap.

Trading volume across these markets: $27,552 in USDC traded over the last 24 hours. The June contract is thin, with only $3,464 required to move odds 5 points, making it vulnerable to large trades. The largest 24-hour move was a 2-point drop, consistent with cautious repositioning rather than a rush to one side.

At 36¢, a YES share on the June 30 contract pays $1 if Starmer is ousted, a potential 2.78x return. That payout improves if opposition MPs press the Mandelson scandal harder or if the police probe produces damaging findings.

Watch for Labour Party moves, particularly from Angela Rayner or Wes Streeting, and any shifts in party support that could force Starmer out. Upcoming House of Commons sessions matter most if no-confidence votes or leadership challenges materialize.

Get prediction market intelligence as a structured API feed. Early access waitlist.