New Hampshire primary: Donald Trump and Bernie Sanders win — live updates

Donald Trump wins the Republican vote, while Bernie Sanders beats Hillary Clinton

Donald Trump and Bernie Sanders won the New Hampshire primary on Tuesday. (Getty Images)

Donald Trump and Bernie Sanders won the New Hampshire primary on Tuesday, just as polls have projected. John Kasich, governor of Ohio, suprised and finished in second place.

• What's the significance of winning New Hampshire?
• See how much Republican candidates spent on attack ads in New Hampshire
• The polls have opened with most due to close by 7pm local time (12am GMT)
• Voters in Dixville Notch chose John Kasich for the Republicans and Bernie Sanders for the Democrats
• But in nearby Millsfield, Ted Cruz beat Donald Trump and Hillary Clinton beat Mr Sanders
• Why the New Hampshire primary is vital for prospective Presidents
• Bernie Sanders has severely dented Hillary Clinton's lead
• But Trump was comfortably ahead for Republicans after debate

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Mr Trump was leading the Republican field according to opinion polls, after Marco Rubio's rocky performance in a debate left Ted Cruz, the Texas senator, as his main rival.

In the Democrats' race, Mr Sanders has held an advantage over Hillary Clinton in New Hampshire for weeks.

“We're running a very radical campaign because we are telling the American people the truth and that's something that is not often told in the political world,” he said after finishing a narrow second to Mrs Clinton in the Iowa caucuses.

The New Hampshire primary traditionally plays a pivotal role by providing momentum to the winners heading into the next contests in South Carolina and Nevada. Those candidates who fare poorly could see donations dry up and face pressure to withdraw from the race.

In the last 10 elections, the winner of the Republican primary went on to become the eventual nominee eight times and on the Democratic side, seven winners went on to become nominees.

Additional reporting by AP