‘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 TrumpImpeachment? Not so fast without missing element of criminal intent Feds say marijuana ties could prevent immigrants from getting US citizenship Trump approval drops to 2019 low after Mueller report's release: poll 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 BidenResurfaced Buttigieg yearbook named him 'most likely to be president' On The Money: House Dem says marijuana banking bill will get vote in spring | Buttigieg joins striking Stop & Shop workers | US home construction slips in March | Uber gets B investment for self-driving cars The Hill's 12:30 Report: Dems face tricky balancing act after Mueller report MORE, Massachusetts Sen. Elizabeth WarrenElizabeth Ann WarrenResurfaced Buttigieg yearbook named him 'most likely to be president' The STATES Act will expose flawed marijuana legacy Impeachment? Not so fast without missing element of criminal intent MORE (D), Vermont Sen. Bernie SandersBernard (Bernie) SandersResurfaced Buttigieg yearbook named him 'most likely to be president' On The Money: House Dem says marijuana banking bill will get vote in spring | Buttigieg joins striking Stop & Shop workers | US home construction slips in March | Uber gets B investment for self-driving cars Buttigieg joins striking Stop & Shop workers MORE (I), New Jersey Sen. Cory BookerCory Anthony BookerResurfaced Buttigieg yearbook named him 'most likely to be president' Man arrested for threatening Dems, citing Omar comments Buttigieg says he wouldn't be opposed to having Phish play at his inauguration MORE (D), California Sen. Kamala HarrisKamala Devi HarrisFive former Obama ambassadors back Buttigieg Harris: Integrity of US justice system 'took a real blow' with Barr's actions Sanders announces first endorsements in South Carolina MORE (D), former New York City Mayor Michael Bloomberg and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonImpeachment? Not so fast without missing element of criminal intent Former Bush assistant: Mueller report makes Obama look 'just plain bad' Seth Rich's brother calls for those pushing conspiracy to 'take responsibility' 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