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.) holds a commanding lead over the Democratic field in Iowa just days before the state is set to hold its first-in-the-nation caucuses, according to a new poll.

An Emerson College poll released Sunday evening of registered Democrats and left-leaning independents found Sanders in the lead with 30 percent of respondents planning to support him in the caucuses, while 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 (D) followed with 21 percent.

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.) has sunk to fourth place in the poll behind 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.) at 11 percent and 13 percent, respectively, while 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 rounded out the top tier in fifth place with 10 percent.

No other candidate registered above 5 percent support in the poll. Sanders's dominance in the poll comes after a USA Today/Suffolk University poll released earlier in the day showed Biden with a slight lead over Sanders in the state.

The Emerson College poll surveyed 450 Democrats and independents in Iowa via landlines and online polling, and has a margin of error of 4.6 percentage points.