‘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 TrumpTrump says 'Failing New York Times' should be held 'fully accountable' over Russia report Trump says 'Failing New York Times' should be held 'fully accountable' over Russia report Trump tweets ICE will begin removing 'millions' of undocumented migrants 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 BidenTrump hits polling on Fox News: 'Something weird going on at Fox' Trump hits polling on Fox News: 'Something weird going on at Fox' 2020 Democrats look to cut into Biden's lead with black voters MORE, Massachusetts Sen. Elizabeth WarrenElizabeth Ann WarrenTrump hits polling on Fox News: 'Something weird going on at Fox' Trump hits polling on Fox News: 'Something weird going on at Fox' 2020 Democrats look to cut into Biden's lead with black voters MORE (D), Vermont Sen. Bernie SandersBernie SandersTrump hits polling on Fox News: 'Something weird going on at Fox' Trump hits polling on Fox News: 'Something weird going on at Fox' 2020 Democrats look to cut into Biden's lead with black voters MORE (I), New Jersey Sen. Cory BookerCory Anthony Booker2020 Democrats look to cut into Biden's lead with black voters 2020 Democrats look to cut into Biden's lead with black voters Overnight Health Care: Democrats attack after Trump revives talk of ObamaCare replacement | Cruz, Ocasio-Cortez efforts on birth control face major obstacles | CVS investing M to fight teen e-cig use MORE (D), California Sen. Kamala HarrisKamala Devi HarrisTrump hits polling on Fox News: 'Something weird going on at Fox' Trump hits polling on Fox News: 'Something weird going on at Fox' 2020 Democrats look to cut into Biden's lead with black voters MORE (D), former New York City Mayor Michael Bloomberg and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonBroadway play 'Hillary and Clinton' closing early due to low ticket sales Broadway play 'Hillary and Clinton' closing early due to low ticket sales Facing challenge from Warren, Sanders touts strength against Trump 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