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 and 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.) are emerging as the most favored candidates in the 2020 Democratic primary presidential field, according to a new Washington Post-ABC News national poll released just more than a week before the Iowa caucuses.

The survey found that Sanders and Biden are the only candidates registering at least 20 percent support among Democrats and Democratic-leaning registered voters. It also finds that the two candidates' support is steadily rising nationally ahead of the first-in-the-nation Iowa caucuses on Feb. 3.

Thirty-two percent of respondents said they'd vote for Biden to be the Democratic nominee, representing a 4-point increase from a similar poll conducted in October. Sanders trails Biden with 23 percent support, which marks a 6-point jump from October.

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Meanwhile, 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.) comes in a distant third, registering just 12 percent support among Democrats and Democratic-leaning registered voters. The new findings represent an 11-point slide from the previous poll in October.

No other Democratic candidate registers double-figure support, with 8 percent favoring 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 and 7 percent supporting 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. Five percent of respondents said they'd back 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, who has polled well in Iowa and New Hampshire, while 3 percent put their support 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.).

The new survey also shows that voter enthusiasm is high among Democrats as the primary season nears, with 73 percent of respondents saying they are certain to vote in their state's primary or caucuses. And many Democrats -- 53 percent -- are still open to the prospect of shifting their support to another candidate.

Biden is also viewed by Democrats as the candidate best positioned to beat President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE. Thirty-eight percent of say Biden has the best chance of beating the president, pollsters found, while 18 percent say Sanders has the best shot. Ten percent say Warren has the best chance.

Recent polls have increasingly indicated that Biden and Sanders have separated themselves from the rest of the Democratic primary field. A CNN national poll released last week showed that the two were in a statistical tie for the lead. A Monmouth survey unveiled that same day showed Biden with a 7-point lead over the progressive senator nationally.

The new Post-ABC News poll was conducted between Jan. 20 and Jan. 23 among a random national sample of 388 Democrats and Democratic-leaning independents, 349 of which are registered voters. The margin of error is 6 percentage points.