
Former Vice President Joe Biden
Joe BidenArizona Democrats, activists eye protential primary challenge to Sinema over Biden agenda, filibuster Biden and the Border Patrol: So good to have the 'adults' back in charge Dental coverage for Medicare recipients divides parties MORE and Sen. Bernie Sanders
Bernie SandersManchin says reconciliation bill must include controversial Hyde Amendment By refusing to raise the debt limit, Republicans are gambling with Americans' Social Security benefits The Hill's Morning Report - Presented by Alibaba - To vote or not? Pelosi faces infrastructure decision MORE (I-Vt.) are neck-and-neck in a battle for first place in a new Hill/HarrisX 2020 preference national poll.
In the Feb. 7-10 survey, 23 percent of Democratic and Democratic-leaning voters favored Joe Biden while 20 percent preferred Sanders.
While the Vermont senator gained 3 percentage points from the last democratic preference poll, Biden dropped 6 percentage points.
Former New York City Mayor Michael Bloomberg
Michael BloombergBudget impasses mark a critical turning point in Biden's presidency Democrats face bleak outlook in Florida Without drastic changes, Democrats are on track to lose big in 2022 MORE surged in the poll to third place, at 16 percent, a 5 percentage point increase from the last survey. Sen. Elizabeth Warren
Elizabeth WarrenThe Hill's Morning Report - Presented by Alibaba - To vote or not? Pelosi faces infrastructure decision The Hill's Morning Report - Presented by Alibaba - Progressives ready to tank infrastructure bill Democrats search for sweet spot below .5 trillion price tag MORE (D-Mass.) remained steady in the poll, at 9 percent, while Former South Bend, Ind. Mayor Pete Buttigieg
Pete ButtigiegDo progressives prefer Trump to compromise? DOJ sues to block JetBlue-American Airlines partnership On The Money — Presented by Wells Fargo — Pelosi plows full speed ahead on jam-packed agenda MORE jumped 4 percentage points to tie with Warren.
Sen. Amy Klobuchar
Amy KlobucharHillicon Valley — Presented by Xerox — Officials want action on cyberattacks Senate panel advances antitrust bill that eyes Google, Facebook This week: Democrats face mounting headaches MORE (D-Mn.), entrepreneur Andrew Yang
Andrew YangYang's new party will be called 'The Forward Party' Andrew Yang planning to launch third party: report Poll: 73 percent of Democratic voters would consider voting for Biden in the 2024 primary MORE, and billionaire Tom Steyer
Tom SteyerYouth voting organization launches M registration effort in key battlegrounds Overnight Energy: 'Eye of fire,' Exxon lobbyist's comments fuel renewed attacks on oil industry | Celebrities push Biden to oppose controversial Minnesota pipeline | More than 75 companies ask Congress to pass clean electricity standard Celebrities push Biden to oppose controversial Minnesota pipeline MORE all received 3 percent in the poll.
All other candidates received 2 percent or less and 11 percent of voters are still undecided.
Despite his recent drop in the polls, experts have noted Biden's strong support among African Americans and older voters, a factor that might keep him at the top of the leaderboard nationally, if support holds.
"Biden’s strength with African Americans and older voters is keeping him at the top of the polls, though Sanders base is loyal," Molly Murphy, Democratic pollster and Partner of ALG Research told The Hill.
"What is interesting is that in the last 10 or so days, Mike Bloomberg is beginning to surge, outperforming Buttigieg on the heels of his Iowa win, and only slightly behind Sanders and Biden," she added.
Sanders and Bloomberg have gained ground in other nation-wide surveys, including recent Quinnipiac University and Monmouth University polls.
The candidates face off tonight in New Hampshire in the first primary election of the season, where Sanders has been leading in recent surveys.
The Hill-HarrisX poll was conducted online among 913 registered Democratic and Democratic-leaning Independent voters between Feb. 7 and 10. It has a margin of error of plus or minus 3.2 percentage points.
— Gabriela Schulte