Biden, Sanders contend for top spot, Bloomberg sees surge in Hill/HarrisX poll

Former Vice President Joe BidenJoe BidenTrump: McConnell 'helpless' to stop Biden from packing court Biden, first lady send 'warmest greetings' to Muslims for Ramadan The business case for child care reform MORE and Sen. Bernie SandersBernie SandersAmazon workers have spoken — are progressives listening? What's really behind Joe Biden's far-left swing? It's time to declare a national climate emergency 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 BloombergMichael BloombergThe truth behind companies' 'net zero' climate commitments The strategy Biden needs to pass his infrastructure plan Bloomberg, former RNC chair Steele back Biden pick for civil rights division MORE surged in the poll to third place, at 16 percent, a 5 percentage point increase from the last survey. Sen. Elizabeth WarrenElizabeth WarrenOn The Money: Biden .5T budget proposes major hike in social programs | GOP bashes border, policing provisions Overnight Defense: Biden proposes 3B defense budget | Criticism comes in from left and right | Pentagon moves toward new screening for extremists POW/MIA flag moved back atop White House MORE (D-Mass.) remained steady in the poll, at 9 percent, while Former South Bend, Ind. Mayor Pete ButtigiegPete ButtigiegThe Hill's 12:30 Report: Biden meets with bipartisan lawmakers for infrastructure negotiations Senate Republicans label Biden infrastructure plan a 'slush fund' The Hill's Morning Report - Presented by Tax March - Congress returns; infrastructure takes center stage MORE jumped 4 percentage points to tie with Warren.

Sen. Amy KlobucharAmy KlobucharHillicon Valley: Biden nominates former NSA deputy director to serve as cyber czar | Apple to send witness to Senate hearing after all | Biden pressed on semiconductor production amid shortage Apple to send witness to Senate hearing after pushback from Klobuchar, Lee Lobbying world MORE (D-Mn.), entrepreneur Andrew YangAndrew YangEvelyn Yang pens children's book on sexual abuse, reveals she was sexually assaulted as a child Yang pitches plan to revive Broadway, live performances in New York Yang returns to campaign trail following kidney stone MORE, and billionaire Tom SteyerTom SteyerSteyer says he has 'no plans' to run for public office again GOP targets ballot initiatives after progressive wins On The Trail: The political losers of 2020 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