‘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 TrumpO'Rourke: Trump driving global, U.S. economy into recession Manchin: Trump has 'golden opportunity' on gun reforms Objections to Trump's new immigration rule wildly exaggerated 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 BidenJoe BidenPossible GOP challenger says Trump doesn't doesn't deserve reelection, but would vote for him over Democrat Joe Biden faces an uncertain path The Memo: Trump pushes back amid signs of economic slowdown MORE, Massachusetts Sen. Elizabeth WarrenElizabeth Ann WarrenPossible GOP challenger says Trump doesn't doesn't deserve reelection, but would vote for him over Democrat Joe Biden faces an uncertain path The Memo: Trump pushes back amid signs of economic slowdown MORE (D), Vermont Sen. Bernie SandersBernie SandersJoe Biden faces an uncertain path Bernie Sanders vows to go to 'war with white nationalism and racism' as president Biden: 'There's an awful lot of really good Republicans out there' MORE (I), New Jersey Sen. Cory BookerCory Anthony BookerThe Hill's Campaign Report: Battle for Senate begins to take shape Steve King to Gillibrand: Odds of me resigning same as yours of winning presidential nomination We need a climate plan for agriculture MORE (D), California Sen. Kamala HarrisKamala Devi HarrisJoe Biden faces an uncertain path Biden: 'There's an awful lot of really good Republicans out there' Fighter pilot vs. astronaut match-up in Arizona could determine control of Senate MORE (D), former New York City Mayor Michael Bloomberg and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonLewandowski on potential NH Senate run: If I run, 'I'm going to win' Fighter pilot vs. astronaut match-up in Arizona could determine control of Senate Progressive Democrats' turnout plans simply don't add up 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