Biden retains large lead over Sanders, other 2020 Dems in new Hill-HarrisX poll

Former Vice President Joe BidenJoe BidenTrump knocks Romney as 'Democrat secret asset' in new video Giuliani asked State Dept. to grant visa for ex-Ukraine official at center of Biden allegations: report Perry won't comply with subpoena in impeachment inquiry MORE continues to lead an ever-growing pack of Democratic White House hopefuls, according to a Hill-HarrisX poll released Wednesday.

The May 17-18 survey found Biden was the preferred pick to become president of 33 percent of registered voters who identified as Democrats or as independents who leaned toward the party.

Sen. Bernie SandersBernie SandersSanders seeks spark from Ocasio-Cortez at Queens rally On The Money: Supreme Court takes up challenge to CFPB | Warren's surge brings scrutiny to wealth tax | Senators eye curbs on Trump emergency powers Biden seeks to fundraise off fact he's running out of money MORE (I-Vt.) was the choice of 14 percent of respondents. Massachusetts Democratic Sen. Elizabeth WarrenElizabeth Ann WarrenHillicon Valley: GOP lawmakers offer election security measure | FTC Dem worries government is 'captured' by Big Tech | Lawmakers condemn Apple over Hong Kong censorship Sanders seeks spark from Ocasio-Cortez at Queens rally On The Money: Supreme Court takes up challenge to CFPB | Warren's surge brings scrutiny to wealth tax | Senators eye curbs on Trump emergency powers MORE was named by 8 percent followed by mayor Pete ButtigiegPeter (Pete) Paul ButtigiegSanders seeks spark from Ocasio-Cortez at Queens rally Biden seeks to fundraise off fact he's running out of money Biden struggles to reverse fall MORE and Sen. Kamala HarrisKamala Devi HarrisHarris campaign releases web video highlighting opposition to death penalty Sanders seeks spark from Ocasio-Cortez at Queens rally Biden seeks to fundraise off fact he's running out of money MORE (D-Calif.) both with 6 percent. Former Rep. Beto O'RourkeBeto O'RourkeSuper PAC seeks to spend more than million supporting Yang Krystal Ball rips media for going 'all-in' on Buttigieg's debate performance The Hill's Campaign Report: Biden camp faces new challenges MORE was backed by 5 percent of respondents.

None of the other candidates received more than 1 percent support. Several aspirants were not named by any participant: Gov. Steve BullockSteve BullockSuper PAC seeks to spend more than million supporting Yang The Hill's Campaign Report: Biden camp faces new challenges Private flight spending soars in Democratic presidential race MORE (D-Mont.), former Colorado Democratic Gov. John HickenlooperJohn HickenlooperThe Hill's 12:30 Report: Trump seeks distance from Syria crisis Gardner dodges questions about Trump's call for Biden probe 2020 Presidential Candidates MORE, Gov. Jay InsleeJay Robert InsleeOvernight Energy: Farmers say EPA reneged on ethanol deal | EPA scrubs senators' quotes from controversial ethanol announcement | Perry unsure if he'll comply with subpoena | John Kerry criticizes lack of climate talk at debate John Kerry calls out lack of climate questions at debate CNN catches heat for asking candidates about Ellen, Bush friendship at debate MORE (D-Washington), Rep. Eric SwalwellEric Michael SwalwellMulvaney admission deals blow to White House impeachment defense Testimony from GOP diplomat complicates Trump defense Lawmakers, social media users praise photo of Pelosi confronting Trump MORE (D-Calif.), former Sen. Mike Gravel (D-Alaska), Florida mayor Wayne MessamWayne Martin MessamWayne Messam raised this quarter for presidential run The Hill's 12:30 Report: Hunter Biden speaks out amid Ukraine controversy 2020 primary debate guide: Everything you need to know ahead of the October showdown MORE, and author Marianne WilliamsonMarianne WilliamsonThe Hill's Campaign Report: Biden camp faces new challenges 'We lost a giant': 2020 Democrats mourn the death of Elijah Cummings Williamson slams DNC, Tuesday's debate: 'This would all be funny if it weren't so dangerous' MORE.

A large number of respondents, 19 percent, were undecided.

While she still trails the leading two candidates, Warren's support has increased across several different polls in recent weeks but it has come at Sanders' expense, Emma Vigeland, a correspondent with the progressive video network The Young Turks, told Hill.TV on Wednesday.

"Warren is rising and rightly so and she's cutting into that Bernie Sanders chunk which I believe is substantial and not going anywhere," she told "What America's Thinking" host Jamal Simmons.

Biden was more popular among women than among men. Thirty-nine percent of female respondents named the former vice president as their choice while 25 percent of male respondents said the same.

Sanders was the top choice for Democratic-leaning voters between the ages of 18 and 34 while Biden led among older age groups.

Nearly half of respondents (47 percent) who were 65 and older said the former veep was their choice. Biden was backed by 42 percent of participants between 50 and 64 and 35 percent of those between 35 and 49.

Among respondents who were 34 and younger, Sanders was the top pick of 24 percent. Thirteen percent chose Biden while 11 percent named Warren.

The former vice president fared better among respondents whose annual household income was $75,000 or greater than among those earning less than that amount.

Biden was preferred by 30 percent of respondents in the lower-income group and by 38 percent of respondents in the higher-income cohort.

Sanders was supported by 18 percent of Democratic-leaning voters with incomes less than $75,000 while only 8 percent of those earning more than this amount supported him.

The former vice president was the overwhelming favorite among respondents who classified themselves as "moderate" ideologically with 43 percent backing him. No other candidate received double-digit support from this group.

Biden was also the top pick among respondents who described themselves as politically liberal but by a much closer margin. Of the 221 participants who said they were either "strong" or "lean" liberals, the former veep was named by 28 percent while 17 percent named Sanders and 13 percent chose Warren.

Those findings echo earlier polls which indicate that Democratic voters place a much greater priority on defeating President TrumpDonald John TrumpFlorida GOP lawmaker says he's 'thinking' about impeachment Democrats introduce 'THUG Act' to block funding for G-7 at Trump resort Kurdish group PKK pens open letter rebuking Trump's comparison to ISIS MORE in 2020 than on ideological agreement. A May 10-11 Hill-HarrisX survey found that 65 percent of Democrats or independents who leaned toward the party said they would pick a candidate they believed had a stronger chance of winning the general election over one who agreed with them on their top policy issue.

A March USA Today-Suffolk University poll had similar findings, as did an April survey commissioned by a Pennsylvania newspaper of registered Democrats living in the state.

The latest Hill-HarrisX survey was conducted May 17-18 among a statistically representative online panel of 1,030 registered voters with a 95 percent confidence level and a sampling margin of error of 3.1 percentage points. The 2020 Democratic presidential preference question was asked of a subset of 448 respondents who identified as Democrats or as independents who favored the Democratic Party. The sampling margin of error for the subset is 4.6 percentage points.

—Matthew Sheffield