Bernie Sanders has more than twice the support maintained by Hillary Clinton for the Democratic nomination among primary voters in New Hampshire.

Currently, 63 percent of likely Democratic primary voters in the state back the independent senator from Vermont, while 30 percent support Clinton, according to a University of Massachusetts Lowell/7 News poll released Wednesday.

New Hampshire Democrats are also largely firm in their decision to back a particular candidate; 74 percent say that they will definitely vote for the candidate they have chosen, while the remaining quarter believe they could change their minds.

The poll, conducted through the day following the Democratic caucus in Iowa, also indicates that Sanders has more support than Clinton across all specified demographics, including women, those who make more than $100,000 annually, and those age 65 years and older.

Surveys since August have shown Sanders leading Clinton in New Hampshire with increasing support. Following Clinton’s narrow win over Sanders in Iowa, her campaign manager tried to manage expectations for her performance in the New Hampshire primary next week in a memo to fundraisers.

"New Hampshire is Bernie Sanders’ backyard. Vermont shares a media market with New Hampshire, and the voters of New Hampshire have a history of supporting candidates from New England," Clinton campaign manager Robby Mook wrote in the memo, which was obtained by Politico. "So it’s not surprising that Sanders maintains a double-digit lead in the polls there."

Mook went on to emphasize the importance of later-voting states and insist that Sanders’ inability to best Clinton in Iowa proved that he cannot win the general election.

Clinton declared victory over Sanders in Iowa early Tuesday morning while news outlets still deemed the race too close to call. The Associated Press declared Clinton the winner Tuesday afternoon, just 0.2 percentage points separating the former secretary of state and her competitor. Sanders has refused to concede the race, labeling it a "virtual tie" late Monday.

Sanders raised approximately $3 million in the 24 hours following the Iowa caucus. He called his significant support there the beginning of a "political revolution."