Sen. Elizabeth WarrenElizabeth Ann WarrenTensions between McConnell and Schumer run high as trial gains momentum Sanders wants one-on-one fight with Biden Biden, Sanders tax plans would raise less revenue than claimed: studies MORE (D-Mass.) topped progressive rival Sen. Bernie SandersBernie SandersThe Hill's Morning Report - House prosecutes Trump as 'lawless,' 'corrupt' Tensions between McConnell and Schumer run high as trial gains momentum Sanders wants one-on-one fight with Biden 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 BidenThe Hill's Morning Report - House prosecutes Trump as 'lawless,' 'corrupt' What to watch for on Day 3 of Senate impeachment trial Sanders wants one-on-one fight with Biden MORE still maintained his lead over the two progressive candidates at 27 percent support.

South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegThe Hill's Morning Report - House prosecutes Trump as 'lawless,' 'corrupt' Sanders wants one-on-one fight with Biden Overnight Defense: Trump downplays troops' concussion injuries in Iran attack | Dems offer case against Trump on day two of trial | UN links Saudis to hack of Bezos' phone MORE saw a boost in the poll, rising to fourth place with 6 percent support followed by Sen. Kamala HarrisKamala Devi HarrisCalifornia Democrat Christy Smith launches first TV ad in bid for Katie Hill's former House seat Steyer spokesperson: 'I don't think necessarily that Tom has bought anything' Biden wins endorsement of Sacramento mayor MORE (D-Calif.) with 5 percent and former Rep. Beto O’Rourke (D-Texas) with 3 percent.

Entrepreneur Andrew YangAndrew YangBiden leads Sanders by 7 in new national poll Sanders joins Biden atop 2020 Democratic field: poll Sanders holds 4-point lead on Biden in new California poll 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 Jean KlobucharBiden leads Sanders by 7 in new national poll Sanders joins Biden atop 2020 Democratic field: poll The Hill's Morning Report - Trump trial begins with clashes, concessions 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