Poll: Biden holds 7-point lead over 2020 Democratic field

Former Vice President Joe BidenJoe BidenRepublicans consider skipping witnesses in Trump impeachment trial Trump trade deal likely to sow division in Democratic presidential field Trump supporters at Pa. rally 'upset' after Democrats introduce impeachment articles MORE holds a 7-point lead over a crowded field of Democratic presidential candidates in a new poll. 

The Emerson poll found that 34 percent of Democratic primary voters surveyed support Biden, who is trailed by Sen. Bernie SandersBernie SandersTrump trade deal likely to sow division in Democratic presidential field Buttigieg says he doubts consulting work for insurer led to layoffs Trump supporters at Pa. rally 'upset' after Democrats introduce impeachment articles MORE (I-Vt.) at 27 percent. Sen. Elizabeth WarrenElizabeth Ann WarrenTrump trade deal likely to sow division in Democratic presidential field Buttigieg says he doubts consulting work for insurer led to layoffs Trump supporters at Pa. rally 'upset' after Democrats introduce impeachment articles MORE (D-Mass.) had 14 percent support, followed by Sen. Kamala HarrisKamala Devi HarrisPoll: Buttigieg slips into fourth place as Biden widens lead Yang qualifies for December Democratic debate The media have fallen out of love with Bernie, but have voters? MORE (D-Calif.) with 7 percent, South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegTrump trade deal likely to sow division in Democratic presidential field Buttigieg says he doubts consulting work for insurer led to layoffs Biden narrowly ahead in Iowa as Sanders surges, Warren drops: poll MORE (D) with 6 percent and Sen. Cory BookerCory Anthony BookerTrump trade deal likely to sow division in Democratic presidential field Shooting in Jersey City leaves multiple people dead, including police officer Schumer to colleagues running for White House: Impeachment comes first MORE (D-N.J.) with 3 percent. 

The other candidates polled at 1 percent or lower. A majority of respondents — 56 percent — said they might change their vote, and 85 percent said they planned to watch the upcoming Democratic debates.

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“Similar to our other polls, Biden and Sanders voters are the most loyal with 50% to 55% saying they are set on their candidates," said Emerson Poll Director Spencer Kimball in a statement. 

"Comparatively, 33% of Warren, 18% of Harris and 17% of Buttigieg voters say they will stick with their current choices, this suggests that about 30% of the Democratic electorate are spoken for and another 30% leaning toward the top two candidates as of now leaves a narrow lane for another candidate to grab a plurality of the vote,” Kimball added.  

Researchers collected data between June 21 and 24 and the responses of Democratic primary voters have a 4.5 percentage point margin of error. 

More than two dozen people are vying for the 2020 Democratic presidential nomination. Twenty of them will participate in the first Democratic debates this week.