South Bend, Ind. Mayor Pete ButtigiegPete ButtigiegLGBT film festival to premiere documentary about Pete Buttigieg Pete and Chasten Buttigieg welcome twins Coalition urges Democrats to restore billion in transit funding MORE has slipped 4 percentage points in a new Hill-HarrisX poll of the Democratic presidential primary race that finds former Vice President Joe BidenJoe BidenTrump endorses challenger in Michigan AG race On The Money: Democrats get to the hard part Health Care — GOP attorneys general warn of legal battle over Biden's vaccine mandate MORE still leading the pack.

The nationwide survey published Wednesday found that Buttigieg dropped from 9 percent support to 5 percent among likely Democratic voters and Democratic-leaning independents. The South Bend mayor is now in a dead heat for fourth place with former New York Mayor Michael BloombergMichael BloombergWithout drastic changes, Democrats are on track to lose big in 2022 Bidens, former presidents mark 9/11 anniversary The tragedy of 9/11 — an inflection point in American history MORE, who also received 5 percent support.

Buttigieg had recently worked his way to the front of the 2020 Democratic primary, particularly in early primary and caucus states Iowa and New Hampshire. According to the RealClearPolitics averages, Buttigieg leads with 22.4 percent support in Iowa and holds second place in New Hampshire with 17.7 percent support, behind Sen. Bernie SandersBernie SandersBriahna Joy Gray: Push toward major social spending amid pandemic was 'short-lived' Sanders 'disappointed' in House panel's vote on drug prices Manchin keeps Washington guessing on what he wants MORE’s (I-Vt.) 19 percent.

Biden, meanwhile, continues to top the Hill-HarrisX survey at 29 percent.

Sanders and Elizabeth WarrenElizabeth WarrenFederal Reserve officials' stock trading sparks ethics review Manchin keeps Washington guessing on what he wants Warren, Daines introduce bill honoring 13 killed in Kabul attack MORE (D-Mass.) followed, each receiving 13 percent support as they jockey to claim the mantle of the party's progressive wing.

Former Housing and Urban Development Secretary Julian CastroJulian CastroBiden calls on Congress to extend eviction ban with days until expiration Cruz trolled on Twitter for slamming Democrats who fled Texas Julian Castro joins NBC and MSNBC as political analyst MORE has 4 percent support, while Sen. Amy KlobucharAmy KlobucharHarris, CBC put weight behind activist-led National Black Voter Day Seven takeaways from California's recall election Live coverage: California voters to decide Newsom's fate MORE (D-Minn.), tech entrepreneur Andrew YangAndrew YangAndrew Yang planning to launch third party: report Poll: 73 percent of Democratic voters would consider voting for Biden in the 2024 primary Kings launch voting rights effort honoring John Lewis MORE and billionaire Tom SteyerTom SteyerOvernight 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 Six things to watch as California heads for recall election MORE each garnered 3 percent. The rest of the Democratic field registered at 2 percent or less.

The survey comes ahead of Thursday’s 2020 primary debate in Los Angeles, where seven candidates are poised to take the stage.

The sixth Democratic debate has been threatened by two separate labor disputes.

The event was initially supposed to be held at the University of California-Los Angeles but was moved after a local labor group accused the university of “illegal practices” and announced that it was boycotting campus speakers.

The debate’s new location at Loyola Marymount University has also faced a boycott over a fight with a union representing university workers. All seven of the Democrats who qualified for the debate at first threatened to skip the event due to the conflict, but the union has since announced an agreement with food services company Sodexo, allowing for it to continue as planned. 

The Hill-HarrisX poll was conducted among 456 likely Democratic voters and Democratic-leaning independents between Dec. 13 and 14. It has a margin of error of 4.6 percent points.

—Tess Bonn