Good morning. Keir Starmer is on thin ice. The prime minister survived a bruising Tuesday in the Commons as MPs continued to scrutinise his account of the decision to appoint Peter Mandelson as US ambassador. Almost all Labour MPs backed Starmer in a key vote on whether he should face an inquiry into whether he misled parliament. But in Westminster there is a growing feeling that the Labour leader is on borrowed time. Next week’s local and parliamentary elections, which Starmer will face as one of the most unpopular prime ministers since records began, is likely to see public dissatisfaction crystallise. “He’s in last chance saloon,” one minister said after last night’s vote. For today’s newsletter I spoke with the Guardian’s policy editor, Kiran Stacey , about a critical few weeks for the prime minister and whether Labour MPs could move to replace him. First, the headlines.…