‘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 TrumpFacebook releases audit on conservative bias claims Harry Reid: 'Decriminalizing border crossings is not something that should be at the top of the list' Recessions happen when presidents overlook key problems 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 BidenHarry Reid: 'Decriminalizing border crossings is not something that should be at the top of the list' Warren offers plan to repeal 1994 crime law authored by Biden Panel: Jill Biden's campaign message MORE, Massachusetts Sen. Elizabeth WarrenElizabeth Ann WarrenHarry Reid: 'Decriminalizing border crossings is not something that should be at the top of the list' Warren offers plan to repeal 1994 crime law authored by Biden Panel: Jill Biden's campaign message MORE (D), Vermont Sen. Bernie SandersBernie SandersHarry Reid: 'Decriminalizing border crossings is not something that should be at the top of the list' The exhaustion of Democrats' anti-Trump delusions Warren offers plan to repeal 1994 crime law authored by Biden MORE (I), New Jersey Sen. Cory BookerCory Anthony BookerCastro qualifies for next Democratic primary debates Eight Democratic presidential hopefuls to appear in CNN climate town hall Biden, Buttigieg bypassing Democratic delegate meeting: report MORE (D), California Sen. Kamala HarrisKamala Devi HarrisHarry Reid: 'Decriminalizing border crossings is not something that should be at the top of the list' Warren offers plan to repeal 1994 crime law authored by Biden Sanders leads Democratic field in Colorado poll MORE (D), former New York City Mayor Michael Bloomberg and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonThe exhaustion of Democrats' anti-Trump delusions Poll: Trump trails three Democrats by 10 points in Colorado Soft levels of support mark this year's Democratic primary 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