Keir Starmer faces mounting internal pressure after Labour’s heavy losses in recent local elections, with dozens of MPs publicly calling for his resignation and several ministers stepping down in protest. This leadership uncertainty has elevated Greater Manchester Mayor Andy Burnham as the clear trader favorite, reflecting his consistent high poll ratings among Labour members, his established “Manchesterism” devolution approach, and reports that allies have cleared a path for him to contest a by-election in Makerfield. Wes Streeting and Angela Rayner remain active contenders following their own positioning moves, while the notable share priced on no leadership change in 2026 captures the possibility that Starmer could weather the immediate revolt and retain the premiership through the year.