Young voters, in particular, have rejected the advice of Britain’s political establishment, including moderate Labour voices who have opposed Corbyn ever since he took control of the party. A huge majority of under-24s now say they are happy to risk whatever remains of the status quo and opt for a hard-left prime minister for the first time in British history.

U.S. President Donald Trump has blundered into helping Corbyn directly in the final week of the campaign by attacking London’s Labour mayor, in the aftermath of the London Bridge terror attack. In the face of Trump’s goading, Sadiq Khan has remained dignified as he leads London’s defiant response to those grotesque murders.

While Corbyn leapt to his Labour colleague’s defense, Theresa May has repeatedly refused to stand up to the U.S. president despite intense media questioning, just as she failed to rebuke him when Trump pulled out of the Paris climate accord last week. May has been left looking weak—and, in the eyes of Britain, she is on the wrong side of the fight.

Trump’s impact on this election runs deeper, however. British voters are fully aware that the old political rules have been torn up; after his runaway victory in the Republican primary we’re still waiting for Trump to pivot to the center ground.