Joe cried, Kamala cried and so did I. Can this be the Democrats putting on a better show than Trump ever did? | Emma Brockes

The terror of the election campaign is yet to come. But good vibes at the convention are surely an opportune sign for Harris and Tim Walz

He looks perkier," said my nine-year-old, passing the screen as I watched footage of Joe Biden speaking on the first day of the Democratic national convention in Chicago. The president did, indeed, look perkier, borne aloft by the gratitude of 23,000 people in the hall and the millions beyond it for the fact he is no longer seeking re-election. By itself, this moment would have lifted the occasion above the norm. But the Democratic convention this year is so uniquely dramatic, so unprecedented in US history, that it rivals and possibly outstrips even President Obama's nomination in 2008. And Biden's heart-wrenching appearance was just the beginning.

When we fight, we win," said Kamala Harris in her opening speech on Monday and there it was, that strange moment of realisation that what she was saying might actually be true. Strange because it's the kind of thing Democrats always say and that, in recent years, has been accompanied by a terrible wah-wah downward arpeggio on the trombone. Limp, disorganised, outshone by Donald Trump; that had been the campaign to date. The speed of the turnaround and the sheer force of the narrative that now propels Harris forwards, has unleashed a psychic energy so strong that on stage in Chicago it practically gave off sparks. Democrats have the scent of blood in their nostrils and thank God, they're finally chasing it.