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Warren passes Biden to lead 2020 Democrats by 4 points in weekly national poll

Sen. Elizabeth WarrenElizabeth WarrenBiden to tap Rohit Chopra to lead CFPB, Gensler for SEC chair: reports Biden tax-hike proposals face bumpy road ahead Porter loses seat on House panel overseeing financial sector MORE (D-Mass.) leads the Democratic primary field by 4 points in the latest Economist/YouGov weekly tracking survey, leapfrogging former Vice President Joe BidenJoe BidenFear of insider attack prompts additional FBI screening of National Guard troops: AP Iran convicts American businessman on spying charge: report DC, state capitals see few issues, heavy security amid protest worries MORE as she continues to enjoy a boost in the polls. 

Twenty-six percent of respondents who say they will vote in their Democratic presidential primary or caucus said Warren is their first choice, a 1-point bump from last week’s survey, while 22 percent said the same for Biden, down from 25 percent last week.

Sen. Bernie SandersBernie SandersBiden tax-hike proposals face bumpy road ahead Senate Democrats leery of nixing filibuster 'Almost Heaven, West Virginia' — Joe Manchin and a 50-50 Senate MORE (I-Vt.) was the only other candidate to register double digit support, at 14 percent, while South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegOn The Money: Retail sales drop in latest sign of weakening economy | Fast-food workers strike for minimum wage | US officials raise concerns over Mexico's handling of energy permits Buttigieg confirmation hearing slated for Thursday James Murdoch predicts 'a reckoning' for media after Capitol riot MORE and Sen. Kamala HarrisKamala HarrisBiden-Harris team unveils inauguration playlist Trump approval rating relatively unchanged in wake of Capitol rioting: NBC News poll Harris to resign from Senate seat on Monday MORE (D-Calif.) rounded out the top five at 7 percent and 5 percent, respectively.

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Warren topped the poll in part by chewing into key demographics for Biden and Sanders. The Massachusetts lawmaker cut her deficit on Biden to 2 points among voters aged 65 years and older and is only behind Sanders by 3 points among voters aged 18-29. She also leads among white voters with 31 percent support, compared to 18 percent for Biden and 13 percent for Sanders.

Warren also edges out Biden by 5 points among self-identified Democrats, 28 percent to 23 percent, though the poll shows a stiff competition for independents, with both Warren and Biden coming in at 20 percent and Sanders getting 18 percent among such voters. 

However, she still struggles with voters of color, trailing Biden by a 36-15 percent margin among black voters and by a 22-17 percent margin among Hispanics. 

Wednesday's survey matches similar polling that has signaled a new division within the primary field, with Warren, Biden and Sanders making up its top tier while relegating candidates like Harris, Buttigieg and others to its middle tier.

The Economist/YouGov poll surveyed 1,087 registered voters from Sept. 28-Oct. 1 and has a margin of error of 3.1 percentage points.

Chris Mills Rodrigo contributed to this report