Fired-up young voters are on the march. They are ready to vote, eager to help elect candidates who will prioritise their interests — including those who are opposed to the president.

Young voters — and those who voted for them — were central to the unlikely success of Senator Bernie Sanders during the Democratic presidential primary. Here, in an excerpt from my new book, The Party is Over: How Republicans Lost Their Way, Dems Gained Their Moment, and the Middle Class Disappeared, they tell me why they got swept up by a charismatic 73-year-old socialist. They tell me what they want, but they don’t see anyone ready to deliver it.

Hillary Clinton looked like the embodiment of modern politics to me, a woman skilled at cultivating relationships with peers — senators, the arts council, members of the board of managers at a venerable museum — and at crafting and making cases for her agendas. She also seemed poised and ready for the top of the ticket. But now many young Sanders voters are left wondering what happened. They feel Clinton did not even try to fight — a belief that weighs heavily on her 2016 campaign. They question the causes of her loss and feel certain someone is to blame.