South Carolina primary: Joe Biden wins big over Bernie Sanders

A candidate whose campaign for president was declared all but dead has come back to record a stunning victory, transforming the race.

Joe Biden has won the South Carolina primary, rejuvenating his presidential campaign and potentially transforming the race.

Mr Biden was once considered the frontrunner for the Democratic nomination. But his fortunes had plummeted over the last month due to terrible results in the earliest states, Iowa and New Hampshire.

Experts wrote him off. One particularly harsh staffer from a rival campaign said Mr Biden had "taken on the stench of death".

But Mr Biden always said South Carolina was his "firewall". It's more racially diverse than the previous states, which means African-American voters - the core of his support - have more of a say in the outcome. And today, that outcome was overwhelmingly good for him.

It may help him emerge as the only viable moderate alternative to left-wing Senator Bernie Sanders going forward.

And it will pile pressure on other candidates to consider dropping out of the race.

Looming in the background of today's results is Super Tuesday, which is on Wednesday this week, Australian time. More than a dozen states will vote at once, awarding a third of the total Democratic delegates on offer during the primaries, and potentially knocking out some candidates.

Read on for all the news in the presidential race.