‘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 TrumpNational Archives says it altered Trump signs, other messages in Women's March photo Dems plan marathon prep for Senate trial, wary of Trump trying to 'game' the process Democratic lawmaker dismisses GOP lawsuit threat: 'Take your letter and shove it' 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 BidenSanders to headline Iowa event amid impeachment trial Hillicon Valley: Biden calls for revoking tech legal shield | DHS chief 'fully expects' Russia to try to interfere in 2020 | Smaller companies testify against Big Tech 'monopoly power' Hill.TV's Krystal Ball on Sanders-Warren feud: 'Don't play to the pundits, play to voters' MORE, Massachusetts Sen. Elizabeth WarrenElizabeth Ann WarrenSanders to headline Iowa event amid impeachment trial Hill.TV's Saagar Enjeti rips Sanders over handling of feud with Warren On The Money — Presented by Wells Fargo — Sanders defends vote against USMCA | China sees weakest growth in 29 years | Warren praises IRS move on student loans MORE (D), Vermont Sen. Bernie SandersBernie SandersSanders to headline Iowa event amid impeachment trial Hill.TV's Saagar Enjeti rips Sanders over handling of feud with Warren On The Money — Presented by Wells Fargo — Sanders defends vote against USMCA | China sees weakest growth in 29 years | Warren praises IRS move on student loans MORE (I), New Jersey Sen. Cory BookerCory Anthony BookerDNC announces new criteria for New Hampshire debate The Hill's Campaign Report: Sanders, Warren feud rattles Democrats The Hill's Morning Report — President Trump on trial MORE (D), California Sen. Kamala HarrisKamala Devi HarrisSanders defends vote against USMCA: 'Not a single damn mention' of climate change The Hill's Morning Report — President Trump on trial Overnight Energy: Schumer votes against USMCA, citing climate impact | Republicans offer details on their environmental proposals | Microsoft aims to be carbon negative by 2030 MORE (D), former New York City Mayor Michael Bloomberg and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonSupreme Court agrees to hear 'faithless elector' cases Poll: Sanders holds 5-point lead over Buttigieg in New Hampshire Climate 'religion' is fueling Australia's wildfires 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