Former Vice President Joe Biden Joe BidenOmar fires back at Trump over rally remarks: 'This is my country' Trump mocks Biden appearance, mask use ahead of first debate Trump attacks Omar for criticizing US: 'How did you do where you came from?' MORE leads the Democratic pack of contenders for the White House despite a week of accusations of improper touching and kissing from seven women, according to a new Hill-HarrisX poll released Monday.

Biden won 28 percent support in the survey, compared to 20 percent for Sen. Bernie Sanders Bernie SandersButtigieg stands in as Pence for Harris's debate practice Bernie Sanders warns of 'nightmare scenario' if Trump refuses election results Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (I-Vt.).

Biden, who has yet to formally enter the race, and Sanders were well ahead of the rest of the candidates in the poll of 660 registered voters who identified as Democrats or independents.

Former Rep. Beto O'Rourke Beto O'RourkeJimmy Carter says his son smoked pot with Willie Nelson on White House roof O'Rourke endorses Kennedy for Senate: 'A champion for the values we're most proud of' 2020 Democrats do convention Zoom call MORE (D-Texas) placed third with 8 percent support, while Sen. Elizabeth Warren Elizabeth WarrenHarris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda Judd Gregg: The Kamala threat — the Californiaization of America GOP set to release controversial Biden report MORE (D-Mass.) won 7 percent.

Warren was followed by Sen. Kamala Harris Kamala HarrisButtigieg stands in as Pence for Harris's debate practice First presidential debate to cover coronavirus, Supreme Court Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (D-Calif.) with 6 percent and Sen. Cory Booker Cory Anthony BookerBipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE (D-N.J.) with 4 percent.

Pete Buttigieg Pete ButtigiegButtigieg stands in as Pence for Harris's debate practice Hillicon Valley: FBI, DHS warn that foreign hackers will likely spread disinformation around election results | Social media platforms put muscle into National Voter Registration Day | Trump to meet with Republican state officials on tech liability shield Facebook takes down Chinese network targeting Philippines, Southeast Asia and the US MORE, the Democratic mayor of South Bend, Ind., was named by 3 percent of respondents, while Sens. Amy Klobuchar Amy KlobucharSocial media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (D-Minn.) received 3 percent support. Kirsten Gillibrand Kirsten GillibrandSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Suburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits MORE (D-N.Y.) had 2 percent.

Biden enjoyed a strong lead among respondents who identified as Democrats. The former vice president was the top choice of 36 percent of party loyalists compared to Sanders's 19 percent. Harris was the third-most popular choice among Democratic voters with 9 percent.

Sanders was the top choice of voters who identified as independents, with 21 percent support to Biden's 19 percent. O'Rourke was the pick of 10 percent of independent voters, while Warren was named by 9 percent.

"That Bernie Sanders and his scary democratic socialist platform hasn't scared away people who self-identify as independents tells me perhaps there's a lot more left-leaning independents than we discuss generally," Sophia Tesfaye, the deputy politics editor at Salon, said on Monday's broadcast of "What America's Thinking."

"We discuss independents as though they're moderate, more conservative, but there's a lot of disillusioned former Democrats out there," she added.

The survey found something of a gap between older and younger voters, with Biden doing better with the former and Sanders doing better with the latter.

The former vice president led among respondents of all parties across every age group except for those who were between the ages of 18 and 34. Sanders was the top choice of that group, with 21 percent to Biden's 18 percent.

Among voters of all parties who were between 35 and 49, Biden led with 27 percent support compared to Sanders's 26 percent. O'Rourke was the third-most popular candidate with the group, receiving 12 percent support.

The former vice president was the top choice of 29 percent of respondents between the ages of 50 and 64. No other candidate received double-digit support among the age group aside from Sanders, who had 16 percent support.

Among respondents aged 65 and up, Biden received 30 percent support, while Sanders received 11 percent. Warren was the choice of 10 percent. No other candidate received double-digit support.

"U.S. voters still skew older and that's what gives Biden a lot more traction amongst registered voters and in the general population than what Sanders has," Dritan Nesho, the CEO of HarrisX told "What America's Thinking" host Jamal Simmons.

The latest Hill-HarrisX survey was conducted April 5 and April 6 among 1,000 registered voters with a 95 percent confidence level. The subgroup of Democratic and independent registered voters has a sampling margin of error of 4 percentage points. The full sample has a sampling margin of error of 3.1 percentage points.

— Matthew Sheffield