MANCHESTER, N.H. — Democratic presidential candidate Pete Buttigieg Pete ButtigiegBogeymen of the far left deserve a place in any Biden administration Overnight Defense: Woodward book causes new firestorm | Book says Trump lashed out at generals, told Woodward about secret weapons system | US withdrawing thousands of troops from Iraq A socially and environmentally just way to fight climate change MORE's support has surged in New Hampshire ahead of the state's primary, according to a new WBZ–Boston Globe–Suffolk University daily tracking poll released on Thursday night.

The former South Bend, Ind., mayor's support shot up 4 points, to 23 percent, in the state over the past 24 hours, according to the survey. Sen. Bernie Sanders Bernie SandersSenate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Schumer, Sanders call for Senate panel to address election security MORE (I-Vt.) still leads with 24 percent support, but the latest results put the two candidates closer in a virtual tie.

Sen. Elizabeth Warren Elizabeth WarrenNo new taxes for the ultra rich — fix bad tax policy instead Democrats back away from quick reversal of Trump tax cuts It's time for newspapers to stop endorsing presidential candidates MORE (D-Mass.) came in with 13 percent support in the poll, and former Vice President Joe Biden Joe BidenThe Memo: Warning signs flash for Trump on debates Senate Republicans signal openness to working with Biden National postal mail handlers union endorses Biden MORE garnered 11 percent support in the Granite State.

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The latest tracking poll number comes as Buttigieg and Sanders are locked in a dead heat in Iowa after the first-in-the-nation caucuses with 100 percent of the results in.

Buttigieg leads by a narrow margin with 26.2 percent among Iowa state delegate equivalents, while Sanders is on his heels at 26.1 percent.

Despite the tight race, both campaigns declared victory on Thursday night.

"It's fantastic news to hear that we won," Buttigieg said at a CNN town hall in Manchester, N.H. "I want to say that Sen. Sanders had a great night too, and I want to congratulate him and his supporters."

Meanwhile, senior Sanders campaign adviser Jeff Weaver released a statement touting what they said was a win in Iowa.

“Tonight's release of data by the Iowa Democratic Party confirms Sen. Bernie Sanders won the Iowa caucus,” Weaver said.

The WBZ–Boston Globe–Suffolk University daily tracking poll is made up of a two-day rolling sample of 500 likely New Hampshire Democratic primary voters. The poll's margin of error is plus or minus 4.4 percentage points.