White House hopefuls have headed to New Hampshire to campaign for Tuesday\'s party nomination vote, after Iowa\'s result threw the races wide open.
Democratic candidate Barack Obama and Republican Mike Huckabee emerged victorious there in the first contest of the 2008 US presidential election.
Former Democratic front-runner Hillary Clinton said she remained optimistic after finishing a surprise third.
Both Iowa and New Hampshire can boost contenders\' campaigns.
All the major candidates are fanning out across New Hampshire for political events before the primary vote takes place on 8 January.
