Biden just 1 point ahead of Warren in new weekly tracking poll

Sen. Elizabeth WarrenElizabeth WarrenBiden campaign says no VP pick yet after bike trail quip Biden edges closer to VP pick: Here's who's up and who's down Democratic convention lineup to include Ocasio-Cortez, Clinton, Warren: reports MORE (D-Mass.) is trailing former Vice President Joe BidenJoe BidenBiden says Trump executive order is 'a reckless war on Social Security' Trump got into testy exchange with top GOP donor Adelson: report Blumenthal calls for declassification of materials detailing Russian threat to US elections MORE by just 1 point in a new Economist–YouGov weekly tracking poll.

Biden sits at 21 percent support in the survey, while Warren is close behind at 20 percent. The next candidate is Sen. Bernie SandersBernie SandersThe Memo: Trump team pounces on Biden gaffes The Hill's Campaign Report: US officials say Russia, China are looking to sow discord in election Warren urges investment in child care workers amid pandemic MORE (I-Vt.) at 16 percent support among voters. 

The survey comes as Warren continues to outpace Sanders, the other progressive in the race, and move closer to Biden in other polls. 

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Biden, by and large, remains the front-runner in most surveys, but Warren's rise in the polls comes with the Vermont senator falling from second to third place. 

A Monmouth University poll of Iowa caucusgoers released on Sunday showed Warren at 19 percent support, while Sanders sat at 9 percent support. Biden still led the pack at 28 percent in that survey. 

Sanders's campaign has rejected the notion that he is losing ground to Warren, arguing that it is a misleading narrative created by the news media. 

“We’re sort of in the phase called the ‘Bernie write-off,’” senior adviser Jeff Weaver told reporters in a call on Monday. “There seems to be a direct correlation between the media coverage of the polls and Bernie Sanders’s standing in those polls.”

“Polls are one thing, but the energy that is on the ground is most important,” Nina Turner, one of the co-chairs of Sanders’s campaign, said.

The Economist–YouGov poll was conducted Aug. 10-13 among 1,500 adult U.S. citizens. The margin of error is plus or minus 2.6 percentage points.