‘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 TrumpSchiff urges GOP colleagues to share private concerns about Trump publicly US-China trade talks draw criticism for lack of women in pictures Overnight Defense: Trump to leave 200 troops in Syria | Trump, Kim plan one-on-one meeting | Pentagon asks DHS to justify moving funds for border wall 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 BidenHarry Reid says he won’t make 2020 endorsement until after Nevada caucus Hillary Clinton met with Biden, Klobuchar to talk 2020: report The Hill's Morning Report - What to watch for as Mueller’s probe winds down MORE, Massachusetts Sen. Elizabeth WarrenElizabeth Ann WarrenKamala Harris: Trump administration ‘targeting’ California for political purposes Harry Reid says he won’t make 2020 endorsement until after Nevada caucus Gillibrand to appear on Fox News Monday night MORE (D), Vermont Sen. Bernie SandersBernard (Bernie) SandersKamala Harris: Trump administration ‘targeting’ California for political purposes Harry Reid says he won’t make 2020 endorsement until after Nevada caucus Gillibrand to appear on Fox News Monday night MORE (I), New Jersey Sen. Cory BookerCory Anthony BookerKamala Harris: Trump administration ‘targeting’ California for political purposes Gillibrand to appear on Fox News Monday night Overnight Energy: Trump ends talks with California on car emissions | Dems face tough vote on Green New Deal | Climate PAC backing Inslee in possible 2020 run MORE (D), California Sen. Kamala HarrisKamala Devi HarrisKamala Harris: Trump administration ‘targeting’ California for political purposes Gillibrand to appear on Fox News Monday night Harris on Smollett: 'I'm sad, frustrated, and disappointed' MORE (D), former New York City Mayor Michael Bloomberg and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonHillicon Valley: Trump pushes to speed up 5G rollout | Judge hits Roger Stone with full gag order | Google ends forced arbitration | Advertisers leave YouTube after report on pedophile ring 4 ways Hillary looms over the 2020 race Hillary Clinton met with Biden, Klobuchar to talk 2020: report 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