While much of the focus is on the Iowa result, it is a small, largely white, state – the key results for the presidential nominee will come in on March 3.
Pete Buttigieg and Bernie Sanders take the lead in Iowa after a debacle with the results reporting - now the candidates move on to New Hampshire, where Sanders is the favourite.
Despite a drop in support after the first Democratic presidential debate, Joe Biden’s perceived electiability is serving him well in the race to secure his party’s nomination.