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 opened up a 7-point lead in Iowa, according to a New York Times/Siena College poll released Saturday, a strong showing in a volatile primary battle just over a week away from the state’s caucuses.

Sanders won the support of 25 percent of Democratic caucusgoers in the survey, followed by 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 at 18 percent, 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 at 17 percent and 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.) at 15 percent.

No other candidate breaks double digits in the poll, with Sen. Amy Klobuchar Amy KlobucharThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill EPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates MORE (D-Minn.) coming the closest at 8 percent.

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The poll marks a 6-point jump for Sanders from the last Times/Siena College survey in October, a boost that came largely at the expense of Warren, a fellow progressive who dropped 7 points.

The flip-flop came after months of the two battling for the primary field’s progressive mantle and after Sanders and Warren feuded this month over a 2018 meeting in which Warren asserted Sanders disagreed with her belief that a woman could win the presidency. The Vermont senator vehemently denied the claim.

The results for Buttigieg and Biden in the new poll remained the same as October.

Recent polling has shown a packed top tier in both Iowa and New Hampshire, which holds its primary shortly after the Hawkeye State’s caucuses, with Sanders, Biden, Buttigieg and Warren bunched near the top. However, Sanders has edged out leads in several of the most recent surveys, suggesting he is peaking right before voters head to the polls on Feb. 3 in Iowa.

Despite Sanders’s strength in the poll and the loyal following he’s cultivated since his failed 2016 presidential run, the senator could face headwinds in Iowa should moderates ultimately coalesce behind a single candidate.

Fifty-five percent of the caucusgoers surveyed said they prefer a candidate who is “more moderate than most Democrats,” while 38 percent said they want one who is “more liberal than most Democrats.”

The New York Times/Siena College poll surveyed 584 Democratic caucusgoers from Jan. 20 to Jan. 23 and has a margin of error of 4.8 percentage points.