Sen. Elizabeth WarrenElizabeth WarrenTreasury says more rental aid is reaching tenants, preventing evictions 11 senators urge House to pass .5T package before infrastructure bill Senate Democrats seeking information from SPACs, questioning 'misaligned incentives' MORE (D-Mass.) topped progressive rival Sen. Bernie SandersBernie SandersDon't let partisan politics impede Texas' economic recovery The Hill's Morning Report - Presented by Alibaba - Democrats argue price before policy amid scramble Overnight Energy & Environment — Presented by the League of Conservation Voters — EPA finalizing rule cutting HFCs 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 BidenFighter jet escorts aircraft that entered restricted airspace during UN gathering Julian Castro knocks Biden administration over refugee policy FBI investigating alleged assault on Fort Bliss soldier at Afghan refugee camp MORE still maintained his lead over the two progressive candidates at 27 percent support.

South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegDOJ sues to block JetBlue-American Airlines partnership On The Money — Presented by Wells Fargo — Pelosi plows full speed ahead on jam-packed agenda Blumenthal calls on Buttigieg to investigate American Airlines-JetBlue partnership MORE saw a boost in the poll, rising to fourth place with 6 percent support followed by Sen. Kamala HarrisKamala HarrisTwo 'View' hosts test positive for coronavirus ahead of Harris interview Rep. Karen Bass to run for mayor of Los Angeles: report Biden taps big bank skeptic to for top regulatory post MORE (D-Calif.) with 5 percent and former Rep. Beto O’Rourke (D-Texas) with 3 percent.

Entrepreneur Andrew YangAndrew YangYang's new party will be called 'The Forward Party' Andrew Yang planning to launch third party: report Poll: 73 percent of Democratic voters would consider voting for Biden in the 2024 primary 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 KlobucharHillicon Valley — Presented by Xerox — Officials want action on cyberattacks Senate panel advances antitrust bill that eyes Google, Facebook This week: Democrats face mounting headaches 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