Sen. Elizabeth WarrenElizabeth 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.) topped progressive rival Sen. Bernie SandersBernie 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.) in a new national poll released on Tuesday.

The Hill-HarrisX survey showed that 19 percent of Democrats and Democratic-leaning independents backed Warren, a 4-point increase from an Oct.6-7 poll conducted before last week’s Democratic debate in Ohio.

Sanders’ support, meanwhile, dipped from 17 percent to 14 percent among those polled. 

However, Vice President Joe BidenJoe BidenSenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE still maintained his lead over the two progressive candidates at 27 percent support.

South Bend, Ind., Mayor Pete ButtigiegPete 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 saw a boost in the poll, rising to fourth place with 6 percent support followed by Sen. Kamala HarrisKamala HarrisThe Hill's Campaign Report: Trump and Biden vie for Minnesota | Early voting begins in four states | Blue state GOP governors back Susan Collins Kamala Harris: Black Americans have been 'disproportionately harmed' by Trump Biden town hall draws 3.3 million viewers for CNN MORE (D-Calif.) with 5 percent and former Rep. Beto O’Rourke (D-Texas) with 3 percent.

Entrepreneur Andrew YangAndrew 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 drew 2 percent. The rest of the White House contenders running in the Democratic primary polled at 1 percent or less.

Thirteen percent said they were unsure. 

The survey comes a week after 12 Democratic contenders took the debate stage for the fourth Democratic primary debate, where Warren leaned into her new front-runner status and fended off attacks from rivals.

Centrist candidates, including South Bend, Ind., Mayor Pete Buttigieg (D) and Sen. Amy KlobucharAmy 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.), accused the progressive heavyweight of not being transparent with voters about her plan’s cost, specifically over whether it would include tax hikes on the middle class.

Though Warren largely dodged questions about her plan’s cost during the debate, Warren said over the weekend that she would soon release a proposal detailing how she would pay for her main health care plan.

Medicare for All has emerged as a leading point of contention among White House hopefuls.

While the progressive wing of the party has doubled down on its support, more moderate candidates have increasingly gone on the attack.

The Hill-HarrisX poll surveyed 1,0001 registered voters between Oct. 21 and Oct. 22. The margin of error is plus or minus 3.1 percentage points.

—Tess Bonn