Poll: Biden support hits record low of 26 percent

Support for former Vice President Joe BidenJoe BidenDes Moines Register endorses Elizabeth Warren as Democratic presidential nominee Sanders faces lingering questions about appeal to women voters George Conway: Witness missing from impeachment trial is Trump MORE has hit record low of 26 percent, according to a new Hill-HarrisX poll released on Thursday.

That figure marks a one-point decrease from the previous Oct. 21-22 poll, and a 9-point decrease from his all-time of 35 percent in June.

However, the former Vice President still maintains his lead over progressive candidates Sens. Elizabeth WarrenElizabeth Ann WarrenDes Moines Register endorses Elizabeth Warren as Democratic presidential nominee Sanders faces lingering questions about appeal to women voters Sunday shows preview: Lawmakers prepare for week two of impeachment trial MORE (D-Mass.) and Bernie SandersBernie SandersKaine: Obama called Trump a 'fascist' during 2016 campaign Des Moines Register endorses Elizabeth Warren as Democratic presidential nominee Sanders faces lingering questions about appeal to women voters MORE (I-Vt.), who have traded spots in recent weeks.

Warren slipped from 19 percent to 15 percent in the latest survey, but maintained her spot in second place, with Sanders trailing behind 14 percent.

Sen. Kamala HarrisKamala Devi HarrisHarris on 2020 endorsement: 'I am not thinking about it right now' Panel: Is Kamala Harris a hypocrite for mulling a Joe Biden endorsement? The Hill's Morning Report — Dems detail case to remove Trump for abuse of power MORE and South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegDes Moines Register endorses Elizabeth Warren as Democratic presidential nominee Candidates weighing using private jets to get to Iowa Biden nabs endorsement from Iowa Democrat in swing district MORE are tied for fourth place, each receiving 6 percent support.

Sen. Amy KlobucharAmy Jean KlobucharDes Moines Register endorses Elizabeth Warren as Democratic presidential nominee Sunday shows preview: Lawmakers prepare for week two of impeachment trial Moore defends Sanders's reputation: 'We don't want the fake, and the phony and the fraudulent' MORE (D-Minn.) followed with 3 percent support, while both Sen. Cory BookerCory Anthony BookerSenate Dems to Pompeo: Comments about NPR reporter 'insulting and contemptuous' Black caucus in Nevada: 'Notion that Biden has all of black vote is not true' The Hill's 12:30 Report: House managers to begin opening arguments on day two MORE (D-N.J.) and Former Housing and Urban Development Secretary Julián Castro drew 2 percent.

Every other candidate in the 2020 race polled at 1 point or less.

Meanwhile, the number of voters who are unsure about which candidate should be the nominee increased slightly from 13 to 16 percent.

The survey comes as a number of 2020 Democratic contenders gear up for the presidential primary debate in Atlanta.

Rep. Tulsi GabbardTulsi GabbardJoe Rogan says he's probably voting for Bernie Sanders Gabbard tells Fox that Clinton's 'Russian asset' remark is 'taking my life away' Hillicon Valley — Presented by Philip Morris International — Bezos phone breach raises fears over Saudi hacking | Amazon seeks to halt Microsoft's work on 'war cloud' | Lawmakers unveil surveillance reform bill MORE (D-Hawaii), who among the candidates polling at 1 percent in the latest Hill-HarrisX poll, became the latest candidate to qualify for the Nov. 20 debate.

Gabbard made the stage after receiving 3 percent support in a Quinnipiac University poll focused on Iowa that was released on Wednesday. She will join Biden, Warren, Sanders and Buttigieg. Businessman Tom SteyerTom Fahr SteyerPoll: 68 percent of Democrats say it 'makes no difference' if a candidate is a billionaire CNN to host two straight nights of Democratic town halls before NH primary Steyer's advice from son after overhearing Warren-Sanders hot mic dust-up: 'Don't be a snitch' MORE and tech entrepreneur Andrew YangAndrew YangSunday shows preview: Lawmakers prepare for week two of impeachment trial John Leguizamo joins the 'Yang Gang' CNN to host two straight nights of Democratic town halls before NH primary MORE are also poised to take the debate stage.

To qualify for the debate this month, candidates have to accrue support from at least 165,000 unique donors and resister at least 3 percent in four qualifying polls or 5 percent in two early state polls by Nov. 13.

—Tess Bonn