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December 2007, 14:25 GMT US poll race quickens amid debate Mitt
Romney (left) and Mike Huckabee (right) The race is heating up
for both Republicans and Democrats Republican hopefuls for the
US presidency have held their last debate before the nominating
elections begin with the Iowa caucus on 3 January.  Opinion
polls suggest the battle for Iowa and the momentum it can give a
candidate's campaign is between Mitt Romney and Mike Huckabee.
The Democratic contenders hold their last debate in Iowa later
in the day.  Hillary Clinton, who leads national polls, has seen
some surveys give Barack Obama the edge in Iowa.  Polls also
suggest the two Democrats are virtually tied in New Hampshire,
which holds its primary on 8 January.  3 Jan: Iowa caucus 8 Jan:
New Hampshire primary 19 Jan: South Carolina primary (Rep) 29
Jan: Florida primary; South Carolina primary (Dem) 5 Feb: some
20 states including California, New York, New Jersey  Candidates
who do not