A former prosecutor takes over a political party in turmoil, promises to turn the page on an era of political chaos, and surges to an election victory that once seemed unthinkable. It’s the playbook that Vice President Kamala Harris is hoping will take her to the White House. And it has already worked – in Britain, where Labour’s Keir Starmer ended 14 years of Conservative rule in a July election.

The official line from Starmer’s government is unwavering: London will work constructively with whoever wins the presidential contest. But sources see similarities between Starmer and Harris’ backgrounds, ideologies and paths to power – and several of Starmer’s allies are hoping the strategy that worked for him will help Harris too. “There are some really striking parallels,” Claire Ainsley, Starmer’s former executive director of policy, told CNN.

“The voters that Harris needs to persuade and motivate are very similar to the description of the voters that Labour needed to persuade and motivate.” Ainsley, who now heads the Project on Center-Left Renewal at the Progressive Policy Institute think tank, presented findings from Labour’s electoral victory to senior Democratic strategists and pollsters in Washington DC last month. Her trip was part of a wider sharing of information between the two camps that is longstanding – and cuts both ways – but which is irking former President Donald Trump in the final stretches of the campaign.

Trump launched an extraor.