Biden atop new poll as Warren makes gains, Sanders and Harris slip

Former Vice President Joe BidenJoe BidenDonald Trump and Joe Biden create different narratives for the election Poll: Biden widens lead over Trump to 10 points Biden: 'We are a nation in pain, but we must not allow this pain to destroy us' MORE remains the 2020 favorite among Democrats and Democratic-leaning independents, according to a new poll from ABC News and The Washington Post that shows Sen. Elizabeth WarrenElizabeth WarrenThe Memo: Trump ratchets up Twitter turmoil Hillicon Valley: Twitter flags Trump tweet for 'glorifying violence' | Cruz calls for criminal investigation into Twitter over alleged sanctions violations | Senators urge FTC to investigate TikTok child privacy issues Warren condemns 'horrific' Trump tweet on Minneapolis protests, other senators chime in MORE (D-Mass.) gaining ground in her presidential bid and Sens. Bernie SandersBernie SandersExpanding tax credit for businesses retaining workers gains bipartisan support The battle of two Cubas Coronavirus Report: The Hill's Steve Clemons interviews Rep. Ro Khanna MORE (I-Vt.) Kamala HarrisKamala Devi HarrisStates respond with force amid another night of protests Protesters knock down White House security barricades as tensions mount over Floyd's death The Memo: Trump ratchets up Twitter turmoil MORE (D-Calif.) losing support.

The survey found that 27 percent of Democrats and Democratic-leaning independents favor Biden in the race for the Democratic presidential nomination.  

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Sanders came in second, with 19 percent of respondents saying they favor the Vermont senator. The percentage represents a decrease of 4 points from July. 

The new survey also found Warren gaining substantial ground. Seventeen percent said they'd support Warren as the Democratic presidential nominee, a 6-point increase in two months. 

Meanwhile, Harris earned support from 7 percent of respondents in the latest poll, representing a 4 percent drop from July.

South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegBiden hopes to pick VP by Aug. 1 It's as if a Trump operative infiltrated the Democratic primary process Here's how Biden can win over the minority vote and the Rust Belt MORE's support has remained steady at 4 percent in the poll, and former Rep. Beto O'RourkeBeto O'RourkeBiden will help close out Texas Democrats' virtual convention: report O'Rourke on Texas reopening: 'Dangerous, dumb and weak' Parties gear up for battle over Texas state House MORE (D-Texas) and businessman Andrew YangAndrew YangAndrew Yang discusses his universal basic income pilot program Andrew Yang on the George Floyd protests in Minneapolis McConnell challenger on how Yang endorsement could help him MORE earned support from 3 percent of respondents. 

The survey indicates that much could change in the coming months as candidates vie for the nomination. Just 43 percent of Democrats and Democratic-leaning independents said they are committed to their candidate if he or she remains in the race. Fifty percent said they'd be willing to go in another direction. 

Biden is also viewed by many as the candidate most able to beat President TrumpDonald John TrumpDonald Trump and Joe Biden create different narratives for the election The hollowing out of the CDC Poll: Biden widens lead over Trump to 10 points MORE. Forty-two percent of respondents said he was the candidate was most likely to defeat Trump. But just 23 percent said Biden would be the "best president for the country." Meanwhile, 19 percent said Warren would make the best president for the country, while 16 percent said the same of Sanders. 

The ABC News-Washington Post poll was conducted between Sept. 2 and Sept. 5 among a national population of 1,003. The survey included a sample of 437 Democrats and Democratic-leaning independent adults. The margin of error for that sample is 5.5 percentage points.