‘None of the above’ tops list of potential 2020 Dems, poll shows

With the 2018 midterms in the rearview mirror, several Democrats are gearing up for the 2020 presidential contest. But so far, no Democrat has attracted broad support from the party's base, according to a new Hill.TV American Barometer poll.

The survey, conducted among 680 registered voters who identified themselves as Democrats or independents, found that "none of the above" was the most popular choice among potential 2020 challengers to President TrumpDonald John TrumpVeterans groups demand end to shutdown: 'Get your act together' Brown launches tour in four early nominating states amid 2020 consideration Pence on border wall: Trump won't be ‘deterred’ by Dem ‘obstruction’ MORE.

Thirty percent of the sample said they would prefer that "none of the above" become the Democratic nominee when asked to choose among former Vice President Joe BidenJoseph (Joe) Robinette BidenBrown launches tour in four early nominating states amid 2020 consideration 5 takeaways from Barr’s testimony Gillibrand announces exploratory committee to run for president on Colbert MORE, Massachusetts Sen. Elizabeth WarrenElizabeth Ann WarrenBrown launches tour in four early nominating states amid 2020 consideration Gillibrand announces exploratory committee to run for president on Colbert Native American group denounces Trump for using Wounded Knee in attack against Warren MORE (D), Vermont Sen. Bernie SandersBernard (Bernie) SandersBrown launches tour in four early nominating states amid 2020 consideration Gillibrand announces exploratory committee to run for president on Colbert Dem chairman Cummings meets with Trump health chief to discuss drug prices MORE (I), New Jersey Sen. Cory BookerCory Anthony Booker5 takeaways from Barr’s testimony Booker presses Barr on impact of mass incarceration on black Americans Barr: I wouldn't go after businesses relying on Obama-era marijuana policy MORE (D), California Sen. Kamala HarrisKamala Devi HarrisBrown launches tour in four early nominating states amid 2020 consideration 5 takeaways from Barr’s testimony Kamala Harris releases 'mixtape' on 'The Late Show' amid 2020 speculation MORE (D), former New York City Mayor Michael Bloomberg and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonGillibrand announces exploratory committee to run for president on Colbert Former PepsiCo CEO being considered for World Bank chief post: report Live coverage: Trump AG pick grilled on Mueller probe at confirmation hearing MORE.

Twenty-five percent of respondents said Biden would be their preferred nominee. Sanders, who ran in the Democratic presidential primary in 2016, came in second with 18 percent.

Twelve percent of the independents and Democrats surveyed picked Clinton, Sanders's one-time presidential rival, who signaled a willingness to run again, saying in an October interviewer that she would still "like to be president."

Other candidates attracted even less support. Harris, Bloomberg and Warren were each the top choice for just 4 percent of respondents.

Warren had been regarded by some progressive advocates as a strong candidate, but she may have lost some support after provoking controversy by releasing a DNA test to address persistent questions about her claims of Native American heritage. A Morning Consult/Politico poll from October found that just 34 percent of Democratic respondents believed Warren's actions were "appropriate."

The American Barometer survey was conducted on Nov. 5-6 among 680 registered voters by the HarrisX polling company. The sampling margin of error is 3.76 percentage points.

— Matthew Sheffield