Will They Learn The Lesson?

He marginalized progressives in his own party, enticed Conservative politicians to switch sides and secured Labour’s largest majority since 1997. For the Democratic think tank Third Way, the takeaway from Mr. Starmer’s triumph was clear: “Centrism wins elections.” That seems a long time ago now. Britain’s government is in the doldrums and Mr. Starmer has become one of its most unpopular leaders ever — with negative approval ratings on a par with the short-lived prime minister Liz Truss, a paragon of political failure. Reform U.K., a Trumpian anti-immigration party spearheaded by Nigel Farage, has led the polls since last April. And in recent months, Labour has also been overtaken on its left by a surging Green Party. This week, it’s going to get worse. In local elections across the country, which are being treated as a referendum on Mr. Starmer’s leadership, Labour is headed for a historic wipeout. The leader once heralded as centrism’s shining future now survives on borrowed time. In many ways, his fall is a very British story. But the Democrats, casting about for an election strategy, should pay attention — for Mr. Starmer’s collapse was written into the nature of his