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Martin O'Malley to withdraw presidential bid

Martin O'Malley has struggled to attract support for his campaign. Credit: Reuters

Martin O'Malley is to withdraw from the US presidential race.

The former Maryland governor's campaign to be the Democrat nominee has struggled to keep up with those of his rivals, Hillary Clinton and Bernie Sanders.

Early results from Iowa suggested O'Malley had endured another disappointing night.

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Caucus delayed by sheer volume of Democrats

ITV News' Washington Correspondent tweets:

Ben Carson to return to Florida after Iowa caucus

Ben Carson. Credit: Reuters

Republican candidate Ben Carson will return to Florida after the Iowa caucus instead of flying to New Hampshire for the next vote.

Senior campaign staff denied suggestions the neurosurgeon, who is trailing his nearest rivals in the race to be the presidential nominee, was planning to drop out of the race.

ITV News Washington News Editor Matt Williams tweets:

Iowans gather as caucuses near

Iowans are preparing to decide who their favoured presidential candidates are with the caucuses set to get underway.

Robert Moore, our Washington Correspondent, said there was "tremendous enthusiasm" in the long queues of people waiting to register for the vote despite delays.

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