Second debate sees little boost for Biden challengers: poll

Former Vice President Joe BidenJoe BidenDemocrats worry they don't have right candidate to beat Trump Trump threatening to fire Mulvaney: report Giuliani pens op-ed slamming 'unprecedented' impeachment inquiry MORE continued to command a steady lead among the crowded primary field after the second round of Democratic debates, according to a poll released Friday. 

The Morning Consult poll conducted after the debates found that 32 percent of potential Democratic primary voters selected Biden as their top-choice candidates, compared to 33 percent after the first Democratic debate in June. 

The poll put Sen. Bernie SandersBernie SandersDemocrats worry they don't have right candidate to beat Trump Overnight Health Care: Top health official defends contract payments to Trump allies | Vaping advocates confident Trump will turn from flavor ban | Sanders gets endorsement from nurses union Krystal Ball credits Gabbard's upswing in 2020 race to 'feckless' Democratic establishment MORE (I-Vt.) in second place with 18 percent support, Sen. Elizabeth WarrenElizabeth Ann WarrenDemocrats worry they don't have right candidate to beat Trump Overnight Energy: BLM staff face choice of relocation or resignation as agency moves | Trump says he's 'very much into climate' | EPA rule would expand limits on scientific studies Krystal Ball credits Gabbard's upswing in 2020 race to 'feckless' Democratic establishment MORE (D-Mass.) in third with 15 percent support and Sen. Kamala HarrisKamala Devi HarrisOutsider candidates outpoll insider candidates Poll: Buttigieg leads Democratic field in Iowa Press: Another billionaire need not apply MORE (D-Calif.) in fourth with 10 percent support. After the first debate, Sanders had 19 percent support and Warren and Harris each had 12 percent support. 

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The first Democratic debate did result in more changes, with Harris spiking from 6 percent support to 12 percent while Biden slid down from 38 percent. 

In the latest poll, conducted Aug. 1, researchers surveyed 2,419 registered voters who said they might vote in a Democratic primary or caucus. The results have a margin of error of plus or minus 2 percentage points. 

Biden, Harris, Warren and Sanders are among just 7 of more than two dozen contenders who have already qualified for the September debates. Biden has consistently polled as the front-runner.