Democrat Barack Obama, fresh from a dramatic victory in Iowa, took his presidential campaign to New Hampshire, where he hopes to deal a potential knock-out blow to Hillary Clinton next week.
Ms Clinton, the New York senator and former first lady who was forced into a disappointing third in yesterday's Iowa caucuses behind Mr Obama and John Edwards, suddenly finds herself in a possible must-win situation in next Tuesday's New Hampshire primary.
She hit back today by telling voters that she alone had the experience and the toughness to win November's presidential election.
For Republicans, former Arkansas Governor Mike Huckabee's win over former Massachusetts governor Mitt Romney in Iowa forced Mr Romney into a scramble to hold on to New Hampshire.
Mr Romney faces a strong challenge from Arizona Senator John McCain whose resurrected campaign was nearly declared dead last summer.
Mr Romney (left), a multimillionaire who has invested heavily in his own campaign, had led New Hampshire polls for months but could see his presidential bid fatally wounded if he does not win next Tuesday.
Iowa's caucuses kicked off a state-by state process to pick the Democratic and Republican candidates to run in the November presidential election to replace President George W Bush.
The prize for the Iowa winners is valuable momentum and at least a temporary claim to the front-runner's slot.
Mr Obama, an Illinois senator seeking to become the first black US president, quickly tried to take advantage of his Iowa victory, urging New Hampshire's undecided voters to vote his way next Tuesday.
'New Hampshire, if you give me the same chance as Iowa gave me last night, I truly believe that I will be president of the United States of America,' Obama told about 1,000 cheering supporters in Portsmouth.
Mr Huckabee (left), 52, a former governor of Arkansas and former Baptist preacher, was the surprise Republican winner in Iowa.
Political pundits do not think Huckabee, who received strong support from evangelical Christians in Iowa, has much of a chance in New Hampshire, giving him plenty of room to make another surprise showing.
