‘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 TrumpHouse Dems demand Barr cancel 'inappropriate' press conference on Mueller report DOJ plans to release 'lightly redacted' version of Mueller report Thursday: WaPo Nadler accuses Barr of 'unprecedented steps' to 'spin' Mueller report 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 BidenMcAuliffe says he won't run for president in 2020 Ex-Obama campaign manager: Sanders can't beat Trump Trump says he'd like to run against Buttigieg MORE, Massachusetts Sen. Elizabeth WarrenElizabeth Ann WarrenOvernight Defense: Reports detail effect of transgender military ban | Watchdog auditing 8 billion submarine program | Warren questions top general on climate change Booker calls for sweeping voting rights reforms Warren praises Ocasio-Cortez in Time 100 MORE (D), Vermont Sen. Bernie SandersBernard (Bernie) SandersOvernight Health Care: DOJ charges doctors over illegal opioid prescriptions | Cummings accuses GOP of obstructing drug pricing probe | Sanders courts Republican voters with 'Medicare for All' | Dems probe funding of anti-abortion group Ex-Obama campaign manager: Sanders can't beat Trump Booker calls for sweeping voting rights reforms MORE (I), New Jersey Sen. Cory BookerCory Anthony BookerHillicon Valley: Washington preps for Mueller report | Barr to hold Thursday presser | Lawmakers dive into AI ethics | FCC chair moves to block China Mobile | Dem bill targets 'digital divide' | Microsoft denies request for facial recognition tech Booker calls for sweeping voting rights reforms 20 Dems demand no more money for ICE agents, Trump wall MORE (D), California Sen. Kamala HarrisKamala Devi HarrisEx-Obama campaign manager: Sanders can't beat Trump Pollster says Trump's approval rating in 2020 will be impacted by Dem nominee 20 Dems demand no more money for ICE agents, Trump wall MORE (D), former New York City Mayor Michael Bloomberg and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonMcAuliffe says he won't run for president in 2020 Chuck Todd slams reports that DOJ briefed Trump on Mueller findings: 'This is actual collusion' Crowdfund campaign to aid historically black churches hit by fires raises over M 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