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Sen. Elizabeth WarrenElizabeth WarrenOn The Money: Biden .5T budget proposes major hike in social programs | GOP bashes border, policing provisions Overnight Defense: Biden proposes 3B defense budget | Criticism comes in from left and right | Pentagon moves toward new screening for extremists POW/MIA flag moved back atop White House MORE (D-Mass.) topped progressive rival Sen. Bernie SandersBernie SandersHillicon Valley: Amazon wins union election — says 'our employees made the choice' On The Money: Biden .5T budget proposes major hike in social programs | GOP bashes border, policing provisions Overnight Defense: Biden proposes 3B defense budget | Criticism comes in from left and right | Pentagon moves toward new screening for extremists 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 BidenBiden taps California workplace safety leader to head up OSHA Romney blasts end of filibuster, expansion of SCOTUS US mulling cash payments to help curb migration MORE still maintained his lead over the two progressive candidates at 27 percent support.

South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegButtigieg hopes cruises will return by mid-summer Biden to host bipartisan talks on infrastructure next week The Hill's 12:30 Report - Presented by ExxonMobil - World mourns the death of Prince Philip MORE saw a boost in the poll, rising to fourth place with 6 percent support followed by Sen. Kamala HarrisKamala HarrisPelosi planned on retiring until Trump won election: report How Kamala Harris can find the solution for the migration crisis White House unveils official portraits of Biden and Harris MORE (D-Calif.) with 5 percent and former Rep. Beto O’Rourke (D-Texas) with 3 percent.

Entrepreneur Andrew YangAndrew YangEvelyn Yang pens children's book on sexual abuse, reveals she was sexually assaulted as a child Yang pitches plan to revive Broadway, live performances in New York Yang returns to campaign trail following kidney stone 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 KlobucharLobbying world New small business coalition to urge action on antitrust policy Bottom line 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