Biden maintains 19-point lead over Sanders in new poll

Former vice president Joe BidenJoe BidenSouth Africa health minister calls travel bans over new COVID variant 'unjustified' Biden attends tree lighting ceremony after day out in Nantucket Senior US diplomat visiting Southeast Asia to 'reaffirm' relations MORE leads Sen. Bernie SandersBernie SandersPoll: Harris, Michelle Obama lead for 2024 if Biden doesn't run Bernie Sanders' ex-spokesperson apprehensive over effectiveness of SALT deductions BBB threatens the role of parents in raising — and educating — children MORE in the latest Hill-HarrisX poll released Monday by 19 points, maintaining a clear separation from the rest of the field in the Democratic presidential primary,

Biden won 35 percent support from Democratic and Democratic-leaning independent registered voters in the June 1-2 survey, compared to 16 percent for Sanders (I-Vt.).

South Bend, Ind. Mayor Pete ButtigiegPete ButtigiegAdvocates see pilot program to address inequalities from highways as crucial first step Poll: Harris, Michelle Obama lead for 2024 if Biden doesn't run Five reasons for Biden, GOP to be thankful this season MORE was a distant third with 8 percent. He was followed by Sen. Elizabeth WarrenElizabeth WarrenPoll: Harris, Michelle Obama lead for 2024 if Biden doesn't run Biden eyes new path for Fed despite Powell pick Equilibrium/Sustainability — Presented by Southern Company — Storms a growing danger for East Coast MORE (D-Mass) at 5 percent.

Sen. Kamala HarrisKamala HarrisPoll: Biden's job approval gains two points Republicans seem set to win the midterms — unless they defeat themselves Poll: Harris, Michelle Obama lead for 2024 if Biden doesn't run MORE (D-Calif.) 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 were supported by 4 percent of respondents while Sen. Cory BookerCory BookerPoll: Harris, Michelle Obama lead for 2024 if Biden doesn't run Five reasons for Biden, GOP to be thankful this season Senators call for Smithsonian Latino, women's museums to be built on National Mall MORE (D-N.J.) was named by 3 percent.

All of the other Democratic candidates were named by 1 percent or fewer survey participants. Seventeen percent of respondents said they were unsure about their preference.

The results overall are largely similar to a May 17-18 Hill-HarrisX survey which also found Biden with a 19 percent lead over his Vermont-based rival. The former vice president received 33 percent support in the earlier poll while Sanders received 14 percent.

The May survey showed Warren in third place with 8 percent support and Buttigieg in fourth with 6 percent. The shift between the two candidates' support within the polls is within the surveys' sampling margins of error.

The newer poll found Biden as the top named candidate of both men and women and also across all age groups, although his lead over Sanders among voters between 18 and 34 was just one point, indicating a statistical tie. Older voters were overwhelmingly more likely to prefer the former vice president to other candidates with 47 percent of respondents 50 years old and older supporting him.

Among white voters, Biden was the preferred candidate while Sanders and Buttigieg were essentially tied for second-place. Biden enjoyed an even stronger lead among black respondents while Sanders showed strength among Hispanics although the sample size for both groups is too small to state this definitively.

Since Biden's entry into the presidential contest in April, the race has become relatively stable with no candidate able to dislodge Sanders from second-place and Biden from first, although that may change following the first debate contest which will be hosted by the Democratic National Committee June 26 and 27.

Presidential aspirants sharpened their messages over the weekend at the California Democratic Party's annual convention in San Francisco where several candidates called for impeaching President TrumpDonald TrumpJan. 6 panel faces double-edged sword with Alex Jones, Roger Stone Trump goes after Woodward, Costa over China Republicans seem set to win the midterms — unless they defeat themselves MORE. Former Colorado Gov. John HickenlooperJohn HickenlooperFive Senate Democrats reportedly opposed to Biden banking nominee Equilibrium/Sustainability — Presented by Southern Company — Pledged money not going to Indigenous causes The Hill's Morning Report - Presented by ExxonMobil - House to vote on Biden social spending bill after McCarthy delay MORE was booed by attendees after he expressed skepticism about a proposed Green New Deal environmental initiative and proposals to have the federal government administer medical insurance for all Americans.

Warren and Buttigieg took veiled swipes at Biden at the event with the Massachusetts senator implicitly denouncing his recent declarations that Republicans would become more inclined toward bipartisanship if President Trump is defeated in 2020. Buttigieg said that Democrats needed "a new generation of leaders," a reference to Biden's age of 76 years.

Sanders indirectly slammed Biden for skipping the event and argued that the party would not be able to defeat Trump unless it embraced a progressive agenda.

The latest Hill-HarrisX survey was conducted June 1-2 among a statistically representative sample of 1,001 registered voters. The question about 2020 Democratic presidential preference was asked of a subset of 431 respondents who said they were Democrats or independents who leaned toward the Democratic Party.

The larger survey has a 3.1 percent sampling margin of error and a 95 percent confidence level. The subset has a sampling margin of error of 4.7 percentage points.

—Matthew Sheffield