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‘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 TrumpDeath toll in Northern California wildfire rises to 48: authorities Graham backs bill to protect Mueller Denham loses GOP seat in California 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 BidenCastro takes steps toward likely 2020 bid Election Countdown: Lawsuits fly in Florida recount fight | Nelson pushes to extend deadline | Judge says Georgia county violated Civil Rights Act | Biden, Sanders lead 2020 Dem field in poll | Bloomberg to decide on 2020 by February What midterm exit polls tell us about 2020 MORE, Massachusetts Sen. Elizabeth WarrenElizabeth Ann WarrenCastro takes steps toward likely 2020 bid What midterm exit polls tell us about 2020 Deval Patrick: Obama was too eager to compromise with GOP MORE (D), Vermont Sen. Bernie SandersBernard (Bernie) SandersProgressive House Dem pushes for vote on 'Medicare for all' bill Castro takes steps toward likely 2020 bid Election Countdown: Lawsuits fly in Florida recount fight | Nelson pushes to extend deadline | Judge says Georgia county violated Civil Rights Act | Biden, Sanders lead 2020 Dem field in poll | Bloomberg to decide on 2020 by February MORE (I), New Jersey Sen. Cory BookerCory Anthony BookerPavlich: Where is Brett Kavanaugh’s apology? Poll: Biden and Sanders lead 2020 Dem field, followed by Beto O'Rourke Dems find easy target in Trump commerce chief MORE (D), California Sen. Kamala HarrisKamala Devi HarrisCastro takes steps toward likely 2020 bid Pavlich: Where is Brett Kavanaugh’s apology? Kamala Harris celebrates electoral victory of 19 black women in Texas: ‘#BlackGirlMagic’ MORE (D), former New York City Mayor Michael Bloomberg and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonOvernight Defense — Presented by Raytheon — First lady's office pushes for ouster of national security aide | Trump taps retired general as ambassador to Saudis | Mattis to visit border troops | Record number of female veterans to serve in Congress Election Countdown: Lawsuits fly in Florida recount fight | Nelson pushes to extend deadline | Judge says Georgia county violated Civil Rights Act | Biden, Sanders lead 2020 Dem field in poll | Bloomberg to decide on 2020 by February What midterm exit polls tell us about 2020 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