A year ago this week, Prime Minister Keir Starmer of Britain swept into 10 Downing Street with a landslide majority of 172 seats. As his first anniversary approached, more than 120 of those Labour Party members of Parliament threatened to vote down their leader’s signature welfare legislation. It has been that kind of year for Mr. Starmer. Though he made hasty concessions last week to keep the bill on track, the mutiny makes clear what a reversal of fortune the prime minister has suffered. There is no shortage of people with ideas about how Mr. Starmer can turn things around, from sharper messaging to savvier management of his M.P.’s.
