Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.) has jumped out to a commanding lead over his 2020 Democratic primary opponents in New Hampshire, according to a new CNN poll of the early primary state.

The survey, which was released on Sunday and conducted by New Hampshire University, found that 25 percent of likely Democratic primary voters favor the progressive Vermont senator, a four-point increase from October. Sixteen percent of respondents said they would pick former Vice President Joe Biden Joe BidenMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE to be the Democratic nominee.

Former South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBipartisan praise pours in after Ginsburg's death Bogeymen 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 MORE earned a five-point boost in support to 15 percent, surpassing Sen. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass) to come in third. Warren, who placed second in New Hampshire in an identical poll from October, appeared in fourth with 12 percent support. The figure represents a 6-point slide over the last few months for the Massachusetts senator.

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Sanders, Biden, Buttigieg and Warren were the only candidates to register double-digit support among Democrats. Sen. Amy Kobuchar (D-Minn.) earned 6 percent support, while Rep. Tulsi Gabbard Tulsi GabbardRepublicans call on DOJ to investigate Netflix over 'Cuties' film Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Gabbard says she 'was not invited to participate in any way' in Democratic convention MORE (D-Hawaii) and tech entrepreneur Andrew Yang Andrew YangDoctor who allegedly assaulted Evelyn Yang arrested on federal charges The Hill's Campaign Report: Biden weighs in on police shootings | Who's moderating the debates | Trump trails in post-convention polls Buttigieg launches his own podcast MORE earned the backing of 5 percent of voters. The result qualifies Yang for the February Democratic debate.

The New Hampshire survey comes as polls increasingly show Sanders in position to contend with Biden for the Democratic nomination. A new Washington Post-ABC News survey showed that the two are the only candidates registering at least 20 percent support nationally among Democratic leaning voters. In addition, recent polls have shown Sanders neck and neck with Biden in Iowa.

A WBUR News survey released last week also found Sanders with a double-digit lead over the field in New Hampshire, the second state to hold a presidential primary.

CNN noted that Sanders has increased his support (13 percentage points) among liberal likely primary voters in New Hampshire. This has come at the expense of Warren, whose support among that block has slid by seven points. In total, 39 percent of liberal likely primary voters favor Sanders, while 21 percent back Warren.

Thirty-nine percent of likely Democratic primary voters say Sanders will win the New Hampshire primary. But 49 percent of respondents acknowledge that they are still considering their selection. Sanders won New Hampshire by more than 20 points during the 2016 Democratic presidential primaries.

The CNN poll was conducted between Jan. 15 and Jan. 23 among a random population of 1,176 adults in New Hampshire, including 516 likely Democratic primary. The margin of error is 4.3 percent.