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Which Republican candidates are people in New Hampshire backing?

The race to win the Republican nomination for US president has reached New Hampshire - the first primary in the Republican nomination process.

The eventual winner will take on President Obama in November.

Voting is under way and polls show a slight fall in the lead enjoyed by Mitt Romney.

The New Hampshire contest is being watched closely for the way deep economic concerns will affect the result.

Mark Mardell reports.

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