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 is leading the Democratic presidential primary field, according to a new national poll.

Biden is supported by 24 percent of registered Democrats and independents, based on a Reuters-Ipsos poll released Thursday.

Biden is closely trailed by Sen. Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE (I-Vt.), who has 20 percent support, based on the poll.

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Both candidates saw an uptick in support from a Reuters-Ipsos poll released last month that showed Biden with 19 percent support and Sanders at 14 percent support.

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.) maintained her third place spot behind Sanders, at 12 percent. It’s a 3-point increase in support for Warren since last month’s poll.

Former New York City Mayor Michael Bloomberg Michael BloombergTop Democratic super PAC launches Florida ad blitz after Bloomberg donation The Hill's 12:30 Report - Presented by Facebook - Latest with the COVID-19 relief bill negotiations The Memo: 2020 is all about winning Florida MORE’s support increased by 6 points to 10 percent, leapfrogging ahead of 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 7 percent. Buttigieg’s support increased 1 point since last month’s poll.

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.) is behind them at 3 percent, based on the poll.

The results of the national poll were released less than two weeks before primary voting season will kick off with the Iowa caucus. The poll, however, indicates the ranking may change.

Only 43 percent of registered voters surveyed said they are locked in on their choice, based on the poll.

The Reuters-Ipsos poll surveyed 1,108 adults, including 545 people who identified as registered voters and affiliated either as an independent or a Democrat. The results have a credibility interval of about 5 percentage points.