No prime minister in half a century has suffered as steep a drop in popularity as Theresa May did this summer. In three months the Conservatives’ share in the polls fell by 22 percentage points. It took voters five months to turn so strongly against John Major, and eight months to grow so weary of Gordon Brown. But whereas those two leaders eventually fell further, Mrs May seems to have pulled out of her nosedive. Faced with the alternative of Jeremy Corbyn, voters may reckon they can live with her. Another year of Brexit talks—the next one much harder than the last—may yet make them think again.