Politics / 2 MIN READ
Traders now price a two-in-three chance the UK prime minister leaves office by mid-2026 after a wave of MP resignations and calls for his departure.
Market data
Current live odds
Starmer out by June 30, 2026?
A prediction market on Polymarket that asks whether UK Prime Minister Keir Starmer will leave office by June 30, 2026, surged to 65.5% on Wednesday, a 38-percentage-point jump in 24 hours. The move reflects growing turmoil inside the Labour Party after Starmer’s government suffered heavy losses in local elections and faced a coordinated rebellion from its own MPs.
Labour lost nearly 1,500 council seats in local elections last week, a defeat compounded by a surge in support for Nigel Farage’s Reform UK and the Green Party. Within days, more than 90 of Starmer’s 403 MPs called for him to resign or set a departure timetable. Four junior ministers resigned, and Home Secretary Shabana Mahmood privately urged the prime minister to outline an exit plan.
Starmer survived an immediate leadership challenge after no single opponent secured the 81 nominations required under Labour rules to trigger a contest. But the rebellion has left the party in a state of suspended crisis. Key potential successors — Health Secretary Wes Streeting, former Deputy Prime Minister Angela Rayner, and Greater Manchester Mayor Andy Burnham — are maneuvering behind the scenes. Streeting is scheduled to meet Starmer on Wednesday to press for a clearer strategy.
Procedural hurdles complicate any quick replacement. Labour’s rules require 81 MPs to back a challenger, a threshold that has so far prevented a formal challenge. Burnham, a favorite of the party’s left, was blocked from standing for Parliament in January but may now get a path after one Labour MP said they would step down to create a vacancy. Rayner has indicated she would prefer to wait for Burnham, while Streeting’s allies argue for a faster move.
The market’s implied probability of 65.5% suggests traders expect Starmer’s tenure to end within 14 months, either through resignation, a leadership challenge, or a general election. With the next scheduled election not due until 2029, the immediate focus is on whether Streeting or another contender can gather 81 backers before the momentum from the local election rout fades. The market has drawn $3.9 million in total volume since launching in February.
Politics / 1 MIN READ
Earlier this weekPrediction markets price Texas Attorney General as heavy favorite over incumbent Cornyn one week before May 26 Republican primary.