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Former New York City Mayor Michael BloombergMichael BloombergBiden selects Gina Raimondo for Commerce chief: reports 7 surprise moments from a tumultuous year in politics NFL, politics dominate 2020 ratings MORE (D) topped Sen. Kamala HarrisKamala HarrisOn The Money: Retail sales drop in latest sign of weakening economy | Fast-food workers strike for minimum wage | US officials raise concerns over Mexico's handling of energy permits Biden scolds Republicans for not wearing masks during Capitol attack Biden and the new Congress must protect Americans from utility shutoffs 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 BidenAzar in departure letter says Capitol riot threatens to 'tarnish' administration's accomplishments House Democrats introduce measures to oppose Trump's bomb sale to Saudis On The Money: Retail sales drop in latest sign of weakening economy | Fast-food workers strike for minimum wage | US officials raise concerns over Mexico's handling of energy permits MORE (D), Sens. Elizabeth WarrenElizabeth WarrenPorter loses seat on House panel overseeing financial sector OVERNIGHT ENERGY: Nine, including former Michigan governor, charged over Flint water crisis | Regulator finalizes rule forcing banks to serve oil, gun companies | Trump admin adds hurdle to increase efficiency standards for furnaces, water heaters DeVos mulled unilateral student loan forgiveness as COVID-19 wracked economy: memo MORE (D-Mass.) and Bernie SandersBernie Sanders'Almost Heaven, West Virginia' — Joe Manchin and a 50-50 Senate Biden to seek minimum wage in COVID-19 proposal Former Sanders spokesperson: Progressives 'shouldn't lose sight' of struggling Americans during pandemic MORE (I-Vt.), and South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegOn The Money: Retail sales drop in latest sign of weakening economy | Fast-food workers strike for minimum wage | US officials raise concerns over Mexico's handling of energy permits Buttigieg confirmation hearing slated for Thursday James Murdoch predicts 'a reckoning' for media after Capitol riot 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 YangAndrew Yang sparks Twitter uproar with pro-bodega video Yang announces run for New York City mayor Yang files to open campaign account for NYC mayor MORE, Amy KlobucharAmy KlobucharGoogle completes Fitbit acquisition Hillicon Valley: Fringe social networks boosted after Capitol attack | Planned protests spark fears of violence in Trump's final days | Election security efforts likely to gain ground in Democrat-controlled Congress US Chamber of Commerce to stop supporting some lawmakers following the Capitol riots 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 SteyerOn The Trail: The political losers of 2020 Biden Cabinet picks largely unify Democrats — so far Late donor surges push election spending projections to new heights MORE, the primary also lost two candidates over the last few days.

Former Rep. Joe Sestak (D-Pa.) and Montana Gov. Steve BullockSteve BullockBiden's identity politics do a disservice to his nominees Senate Democrat: Party's message to rural voters is 'really flawed' Ducey to lead Republican governors 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