Former Vice President Joe BidenJoe BidenGrant Woods, longtime friend of McCain and former Arizona AG, dies at 67 Sanders on Medicare expansion in spending package: 'Its not coming out' Glasgow summit raises stakes for Biden deal MORE leads his closest competitor in the field of Democratic presidential candidates by 22 percentage points, according to a Hill-HarrisX poll released Monday.

In the June 14-15 survey, Biden garnered support from 35 percent of registered voters who identified as Democrats or as independents who favored the party. The next closest candidate was Sen. Bernie SandersBernie SandersSanders on Medicare expansion in spending package: 'Its not coming out' Briahna Joy Gray: Biden must keep progressive promises or risk losing midterms Overnight Health Care — Presented by Carequest — Study finds Pfizer vaccine almost 91 percent effective for 5 to 11 year olds MORE (I-Vt.), at 13 percent.

Sen. Elizabeth WarrenElizabeth WarrenSinema's office outlines opposition to tax rate hikes The CFPB's data overreach hurts the businesses it claims to help Runaway higher ed spending gains little except endless student debt MORE (D-Mass.) came in third with 7 percent, followed by former Rep. Beto O'RourkeBeto O'RourkeSupport for governors sliding in states without vaccine mandates: survey Abbott bans vaccine mandates from any 'entity in Texas' Abbott disapproval rating up 8 points to 59 percent in San Antonio area: poll MORE (D-Texas) at 6 percent, Sen. Kamala HarrisKamala HarrisObama looks to give new momentum to McAuliffe Kamala Harris engages with heckler during New York speech Biden's safe-space CNN town hall attracts small audience, as poll numbers plummet MORE (D-Calif.) at 5 percent and South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegButtigieg aims to use Tucker Carlson flap to spotlight paternity leave Biden's Big Labor policies will create next round of inflation Airlines should give flight attendants 10 hours of rest between flights: FAA MORE at 4 percent.

New Jersey Democratic Sen. Cory BookerCory BookerSenate Democrats call for diversity among new Federal Reserve Bank presidents Progressives push back on decision to shrink Biden's paid family leave program Emanuel to take hot seat in Senate confirmation hearing MORE drew 3 percent support, while former Housing and Urban Development Secretary Julián Castro was named by 2 percent.

All other candidates who were named by poll participants received 1 percent support or less. Several were not named by any participants: New York Mayor Bill de BlasioBill de BlasioThe Hill's Morning Report - Presented by Uber - Biden makes his pitch as tax questions mount Hochul gets early boost as NY gubernatorial race takes shape Overnight Health Care — Presented by Carequest — Boosters take a big step forward MORE (D), former Colorado Gov. John HickenlooperJohn HickenlooperPennsylvania Republican becomes latest COVID-19 breakthrough case in Congress Ohio GOP congressman tests positive for COVID-19 Colorado remap plan creates new competitive district MORE (D), Washington Gov. Jay InsleeJay Robert InsleeOvernight Health Care — Presented by Carequest — Boosters take a big step forward Fired WSU football coach suing school over illegal termination Nearly 1,900 Washington state employees quit, fired over vaccine mandate MORE (D) and former Sen. Mike Gravel (D-Alaska).

Biden's 35 percent matches the support rating he received in a Hill-HarrisX survey conducted June 1-2. In that poll, Sanders had 16 percent support.

Biden was slightly more popular among male respondents than among female voters in the most recent survey, with 37 percent of men favoring him compared to 32 percent of women.

For Sanders, 16 percent of men supported him, compared to support from 10 percent of women.

Harris received more support from female respondents than males, with 8 percent of women backing her compared to 2 percent of men.

Biden had support from 22 percent of Hispanic respondents, compared with 15 percent for Sanders 13 percent for O'Rourke and 10 percent for Harris. In the previous poll, Biden and Sanders were tied among Latino respondents at 25 percent.

The former vice president fared much better among African-American voters, with 42 percent support. None of the other candidates received double-digit support. In the previous three surveys, Biden was the overwhelming favorite among black respondents.

Biden has also maintained an edge among white Democratic voters, at 36 percent. Sanders was next at 12 percent, followed by 9 percent for Warren.

The June 14-15 Hill-HarrisX poll was conducted online among a statistically representative sample of 424 respondents who identified themselves as registered voters who were Democrats or independents who favored the Democratic Party. It has a sampling margin of error of 4.8 percent and a 95 percent confidence level.

—Matthew Sheffield