Sir Keir Starmer, Labour’s white knight, is stumbling out of the gate. On the clubhouse turn, a new poll shows him 16 points underwater, a plunge of 27 points from when he acceded to prime minister. His victory in the July 4 vote prompted an outpouring of eulogies for the Tories, who’d ruled Britain for 14 years. Labour earned its 411 seats, though, with just over 33 percent of the vote. That’s a far cry from proportional, and shaky stuff for a landslide.