‘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 nominates ambassador to Turkey Trump heads to Mar-a-Lago after signing bill to avert shutdown CNN, MSNBC to air ad turned down by Fox over Nazi imagery 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 BidenNewsom endorses Kamala Harris for president Trump, Biden in dead heat in hypothetical 2020 matchup among Texas voters Biden calls for reauthorization of Violence Against Women Act MORE, Massachusetts Sen. Elizabeth WarrenElizabeth Ann WarrenNewsom endorses Kamala Harris for president Constitutional conservatives need to oppose the national emergency Poll: Sanders, Biden seen as most popular second choices in Dem primary MORE (D), Vermont Sen. Bernie SandersBernard (Bernie) SandersNewsom endorses Kamala Harris for president Business, conservative groups slam Trump’s national emergency declaration Poll: Sanders, Biden seen as most popular second choices in Dem primary MORE (I), New Jersey Sen. Cory BookerCory Anthony BookerNewsom endorses Kamala Harris for president Trump tweets video mocking Dems not cheering during State of the Union Former Virginia Gov McAuliffe writes book about confronting white nationalism MORE (D), California Sen. Kamala HarrisKamala Devi HarrisNewsom endorses Kamala Harris for president Constitutional conservatives need to oppose the national emergency Overnight Health Care — Sponsored by America's 340B Hospitals — Dems blast rulemaking on family planning program | Facebook may remove anti-vaccine content | Medicare proposes coverage for new cancer treatment MORE (D), former New York City Mayor Michael Bloomberg and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonOvernight Defense: Trump declares border emergency | .6B in military construction funds to be used for wall | Trump believes Obama would have started war with North Korea | Pentagon delivers aid for Venezuelan migrants Sarah Sanders says she was interviewed by Mueller's office Trump: I believe Obama would have gone to war with North Korea 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