According to a new poll, Bernie Sanders has a 14-point lead over Hillary Clinton with voters heading into the New Hampshire primary in February.

The Monmouth University numbers indicate that Sanders holds 53 percent of potential primary voters, compared to Clinton’s 39 percent. The former secretary of state fell from 48 percent back in November, when Sander’s had 45 percent.

Long shot candidate Martin O’Malley currently holds 5 percent of potential primary voters.

As the primary approaches, 52 percent of those polled said they had their minds made up about who they intended to vote for. In November, only 35 percent of voters said they were sure of their votes.

The latest poll shows that, although democratic voters in New Hampshire generally have a positive view of both top candidates, Sanders currently enjoys a 90 percent favorability over Clinton's 73 percent.

As CNN reports, Sanders recently told reporters at a campaign stop in Iowa that Clinton’s campaign was in serious trouble. The 74-year-old socialist candidate said he believed Clinton had started to attack his record out of desperation.

"I think a candidate who was originally thought to be the anointed candidate, the inevitable candidate, is now locked in a very difficult race here in Iowa and in New Hampshire," he said. "So obviously in that scenario what people do is start attacking."

Sanders said it was no surprise that, now that her campaign was in trouble, Clinton had started to go negative.

"It could be that the inevitable candidate for the Democratic nomination may not be so inevitable today," he said.

As The Washington Post reports, Clinton has kept up her attacks on Sanders, taking issue with her rival's stance on gun control, as well as his ideas on health care.

Clinton said that Sanders’ “Medicare-for-all” plan would place the Affordable Care Act in jeopardy.

“If that’s the kind of ‘revolution’ he’s talking about, I’m worried, folks,” Clinton said.

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