Democratic presidential hopefuls Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE and Rep. Tulsi Gabbard Tulsi GabbardRepublicans call on DOJ to investigate Netflix over 'Cuties' film Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Gabbard says she 'was not invited to participate in any way' in Democratic convention MORE (D-Hawaii) saw their net favorability among Democratic primary voters take a dip following the most recent Democratic debate and amid Gabbard's high-profile feud with 2016 presidential candidate Hillary Clinton Hillary Diane Rodham ClintonBloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE, a new poll has found.

The results of a Morning Consult survey dated Monday show the net favorability of Biden, the former vice president, slipped 5 percentage points, from 55 percent to 50 percent, and Gabbard's dropped 6 percentage points from 10 percent to 4 percent following the fourth Democratic debate last week in Westerville, Ohio.

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The net favorability of many other candidates remained relatively stable, as Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.) saw a 1 percentage point increase, Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) saw no change and Sen. Kamala Harris Kamala HarrisTexas Democratic official urges Biden to visit state: 'I thought he had his own plane' The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements A game theorist's advice to President Trump on filling the Supreme Court seat MORE (D-Calif.) saw a 1 percentage point drop.

South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice MORE saw the largest net favorability increase, from 33 percent to 36 percent.

Net favorability is calculated by subtracting the percentage of Democratic primary voters who view the candidates unfavorably from those who view them favorably.

The survey still showed Biden leading the Democratic field, with support from 30 percent of Democratic primary voters polled. He was followed by Warren who was supported by 21 percent and Sanders who was supported by 18 percent.

Twelve Democratic hopefuls faced off in the debate.

Gabbard has recently been sparring with Clinton after the former secretary of State suggested, seemingly without evidence, that the lawmaker was a Russian asset. Gabbard has denied this and has slammed Clinton as the "queen of warmongers."

Morning Consult surveyed 11,521 registered voters who said they may vote in the Democratic primary or caucus between Oct. 16-20. The margin of error is plus or minus 1 percentage point.