Over the next five weeks the British prime minister, Rishi Sunak, and the leader of the opposition, Labour’s Keir Starmer, will be battling to persuade voters that they are the best person to helm the next government. Sunak’s election announcement last week surprised many political commentators because his Conservative party is trailing Labour in the opinion polls by more than 20 percentage points. Despite the starkly different polling for their respective parties, both leaders share something in common: low personal popularity with voters. A YouGov poll for Sky News this week found 68% thought Sunak had been a “bad prime...