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

Former Vice President Joe BidenJoe BidenCDC working to tighten testing requirement for international travelers On The Money — Powell pivots as inflation rises Overnight Energy & Environment — Presented by ExxonMobil — Manchin seeks 'adjustments' to spending plan 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 WarrenSenate GOP blocks defense bill, throwing it into limbo Restless progressives eye 2024 Poll: Harris, Michelle Obama lead for 2024 if Biden doesn't run MORE (D-Mass.) gaining ground in her presidential bid and Sens. Bernie SandersBernie SandersOn The Money — Powell pivots as inflation rises Pence-linked group launches 0K ad campaign in West Virginia praising Manchin Senators huddle on path forward for SALT deduction in spending bill MORE (I-Vt.) Kamala HarrisKamala HarrisTrump: McConnell must use debt limit to crush Biden agenda Building back a better vice presidency Stacey Abrams nominated to board of solar energy firm 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 ButtigiegFeehery: Why Democrats are now historically unpopular Harris, Buttigieg to promote infrastructure law in Charlotte 'Fox & Friends Weekend' hosts suggest new variant meant to distract from Biden's struggles MORE's support has remained steady at 4 percent in the poll, and former Rep. Beto O'RourkeBeto O'RourkeO'Rourke seizes on Texas power grid in bid against Abbott McConaughey on Texas run: 'I will let you know shortly' O'Rourke raises M in first 24 hours of Texas governor campaign MORE (D-Texas) and businessman Andrew YangAndrew YangAmerican elections are getting less predictable; there's a reason for that Poll: Harris, Michelle Obama lead for 2024 if Biden doesn't run At 28 percent approval, say goodbye to Kamala Harris being Plan B to an aging Biden 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 TrumpOmar, Muslim Democrats decry Islamophobia amid death threats On The Money — Powell pivots as inflation rises Trump cheers CNN's Cuomo suspension 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.