Poll: Biden holds lead over 2020 Democratic field

Former Vice President Joe BidenJoe BidenJulián Castro: It's time for House Democrats to 'do something' about Trump Warren: Congress is 'complicit' with Trump 'by failing to act' Sanders to join teachers, auto workers striking in Midwest MORE is the favorite among 2020 Democratic presidential candidates, according to a new Washington Post-ABC News poll

The survey found that 13 percent of Democrats and Democratic-leaning respondents would vote for Biden if a 2020 Democratic primary or caucus were held in their state today. Sen. Bernie SandersBernie SandersSanders to join teachers, auto workers striking in Midwest Krystal Ball tears into 'Never Trump' Republicans 2020 Democrats defend climate priorities in MSNBC forum MORE (I-Vt.) came in second with 9 percent of the vote. 

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Five percent of Democrats and Democratic-leaning respondents said they would vote for South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul Buttigieg2020 Democrats defend climate priorities in MSNBC forum MSNBC Climate Change Forum draws 1.3M viewers in 8 pm timeslot Iowa Steak Fry to draw record crowds for Democrats MORE if given the chance today. Meanwhile, Sen. Kamala HarrisKamala Devi HarrisTrump reignites court fight with Ninth Circuit pick MSNBC Climate Change Forum draws 1.3M viewers in 8 pm timeslot Iowa Steak Fry to draw record crowds for Democrats MORE (D-Calif.) and Sen. Elizabeth WarrenElizabeth Ann WarrenWarren: Congress is 'complicit' with Trump 'by failing to act' Sanders to join teachers, auto workers striking in Midwest Pelosi wants to change law to allow a sitting president to be indicted MORE (D-Mass.) each earned 4 percent of the vote.

Three percent of respondents said they would support former Rep. Beto O'RourkeBeto O'RourkeNRA deems O'Rourke 'Salesman of the Month' after Arizona gun store sells out of AR-15s during 'Beto Special' MSNBC Climate Change Forum draws 1.3M viewers in 8 pm timeslot The Hill's 12:30 Report: Trump pushes back over whistleblower controversy MORE (D-Texas). 

The results showcased significantly lower percentages of support than some other polls because the survey asked respondents to pick a candidate but didn't provide a list of names. 

The poll appeared to show that the 2020 Democratic field remains wide open. Fifty-four percent of respondents did not volunteer any candidate when asked who they would vote for if a primary were held today. 

The Post notes that Biden's support has increased by 4 points since a similar poll was conducted in January. Sanders's support shot up by 5 points, as did Buttigieg's. 

Buttigieg's name was not volunteered by any respondent in the January poll, the Post noted. 

Biden, Sanders and Buttigieg have surged to the top of many polls over the last couple of months. Biden officially launched his 2020 campaign last week. 

The Post-ABC poll was conducted between April 22 and April 25 among a national population of 1,001 adults. The margin of error is 5.5 percentage points.