Former New York City Mayor Michael BloombergMichael BloombergWake up, America — see what's coming Bloomberg urges court to throw out lawsuit by former campaign staffers Former Obama Ebola czar Ron Klain says White House's bad decisions have put US behind many other nations on COVID-19; Fears of virus reemergence intensify MORE (D) topped Sen. Kamala HarrisKamala Devi HarrisHillicon Valley: Facebook considers political ad ban | Senators raise concerns over civil rights audit | Amazon reverses on telling workers to delete TikTok Senators raise concerns over Facebook's civil rights audit Biden's marijuana plan is out of step with public opinion MORE (D-Calif.) in a new Hill-HarrisX poll of the Democratic presidential primary race.

The survey released on Monday found that support for the former mayor ticked up from 3 percent to 6 percent among likely Democratic voters and Democratic-leaning independents. 

Sen. Kamala Harris (D-Calif.), meanwhile, fell behind with 2 percent support, a two-point decrease.

This marks the first Hill-HarrisX poll that has been taken since Bloomberg officially jumped into the 2020 race, though he was included as a possible candidate in a previous survey.

However, Bloomberg still significantly trails the party’s current front-runners, former Vice President Joe BidenJoe BidenDonald Trump Jr. to self-publish book 'Liberal Privilege' before GOP convention Tom Price: Here's how we can obtain more affordable care The Memo: Democrats feel rising tide in Florida MORE (D), Sens. Elizabeth WarrenElizabeth WarrenTrump defends Roger Stone move: He was target of 'Witch Hunt' Democrats blast Trump for commuting Roger Stone: 'The most corrupt president in history' Pharma pricing is a problem, but antitrust isn't the (only) solution MORE (D-Mass.) and Bernie SandersBernie SandersBiden wins Louisiana primary Oh, Canada: Should the US emulate Canada's National Health Service? Trump glosses over virus surge during Florida trip MORE (I-Vt.), and South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegBiden campaign hires top cybersecurity officials to defend against threats Biden strikes populist tone in blistering rebuke of Trump, Wall Street Buttigieg's new book, 'Trust,' slated for October release MORE (D). All four contenders have vied for control of the top tier of the Democratic field for months.

Biden still holds the lead, inching up one percentage point to 31 percent support. His fellow top rivals saw a slight dip, with Sanders dropping 3 points to 15 percent support and Warren sliding 5 percentage points to 10 percent.

Buttigieg, who gained momentum in recent weeks, received 9 percent support, a two-point increase from the prior Nov. 16-Nov. 17 poll.

Businessman Andrew YangAndrew YangBiden campaign to take over 'Supernatural' star's Instagram for interview Hillicon Valley: Justice Department announces superseding indictment against WikiLeaks' Assange | Facebook ad boycott gains momentum | FBI sees spike in coronavirus-related cyber threats | Boston city government bans facial recognition technology The Hill's Campaign Report: Progressives feel momentum after primary night MORE, Amy KlobucharAmy KlobucharThe Hill's Coronavirus Report: Fauci says focus should be on pausing reopenings rather than reverting to shutdowns; WHO director pleads for international unity in pandemic response State election officials warn budget cuts could lead to November chaos Biden strikes populist tone in blistering rebuke of Trump, Wall Street MORE (D-Minn.) and former Housing and Urban Development Secretary Julián Castro garnered 2 percent.

The rest of the contenders in the crowded Democratic field received 1 percent in support or less. Another 3 percent said they were unsure. 

The survey comes in light of an ever-fluid Democratic primary race.

Though the field recently expanded with the addition of Bloomberg and billionaire Tom SteyerTom SteyerThe Hill's Campaign Report: Jacksonville mandates face coverings as GOP convention approaches Steyer endorses Markey in Massachusetts Senate primary Celebrities fundraise for Markey ahead of Massachusetts Senate primary MORE, the primary also lost two candidates over the last few days.

Former Rep. Joe Sestak (D-Pa.) and Montana Gov. Steve BullockSteve BullockInternal poll shows tight battle in Montana House race The Hill's Campaign Report: Democratic Unity Taskforce unveils party platform recommendations The Hill's Morning Report - Presented by Facebook - Trump backs another T stimulus, urges governors to reopen schools MORE (D) each ended their 2020 White House bids after failing to gain traction in national polls.

Sestak announced the news in a press release over the weekend, saying he was thankful for what he called an "endeavor filled with immeasurable wisdom, passions, humor and insights to, and from, the people of America."

A day later, Bullock issued a statement announcing his own departure from the 2020 race.

"While the concerns that propelled me to enter in the first place have not changed, I leave this race filled with gratitude and optimism, inspired and energized by the good people I've had the privilege of meeting over the course of the campaign,” he wrote.

The Hill-HarrisX poll surveyed 1,001 registered voters between Nov. 1-Dec. 1. It has a margin of error of plus or minus 3.1 percentage points. 

—Tess Bonn