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

Former Vice President Joe BidenJoe BidenScaramucci attends charity event featuring Biden in the Hamptons Klobuchar knocks Trump: 'This negotiating by tweet hasn't been working' Rendell: Biden 'baked in' as Democratic nominee 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 preps conspiracy theory to explain faltering economy Sanders doubles down on 'Medicare For All' defense: 'We have not changed one word' Sanders, Warren back major shift to fight drug overdoses MORE (I-Vt.) at 27 percent. Sen. Elizabeth WarrenElizabeth Ann WarrenTrump preps conspiracy theory to explain faltering economy Sanders, Warren back major shift to fight drug overdoses Rendell: Biden 'baked in' as Democratic nominee MORE (D-Mass.) had 14 percent support, followed by Sen. Kamala HarrisKamala Devi HarrisSanders doubles down on 'Medicare For All' defense: 'We have not changed one word' Obama reveals his summer playlist Democratic candidates face hard choices as 2020 field winnows MORE (D-Calif.) with 7 percent, South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegSunday shows preview: Trump ratchets up trade war with China Democratic candidates face hard choices as 2020 field winnows Steyer calls on DNC to expand polling criteria for debates MORE (D) with 6 percent and Sen. Cory BookerCory Anthony BookerSteyer calls on DNC to expand polling criteria for debates Gabbard hits DNC over poll criteria for debates The Hill's Campaign Report: Democratic field begins to shrink ahead of critical stretch 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.