Poll: Biden holds 19-point lead over 2020 Democratic field, Warren places second

Poll: Biden holds 19-point lead over 2020 Democratic field, Warren places second

Former Vice President Joe BidenJoe BidenMellman: Trump voters cling to 2020 tale FDA authorizes another batch of J&J vaccine Cotton warns of China collecting athletes' DNA at 2022 Olympics MORE widened his lead in the 2020 Democratic presidential primary to 19 points over second-placed Sen. Elizabeth WarrenElizabeth WarrenProgressives rave over Harrison's start at DNC On The Money: Schumer to trigger reconciliation process on Wednesday | Four states emerge as test case for cutting off jobless benefits Big Tech critic Lina Khan named chair of the FTC MORE (D-Mass.), according to the latest Quinnipiac poll released Monday.

Biden widened his lead after the previous Quinnipiac Poll on July 2 showed Biden's lead over then second-placed candidate Sen. Kamala HarrisKamala HarrisDemocrats learn hard truths about Capitol breach Harris calls for pathway to citizenship for Dreamers on DACA anniversary Abbott says he'll solicit public donations for border wall MORE (D-Calif.) had shrunk to just two points shortly after the first Democratic primary debate.

Warren placed second in the latest Quinnipiac poll with 15 percent support, up from third in the July 2 poll.

Warren was followed closely by Sen. Kamala Harris (D-Calif.), at third with 12 percent support, and Sen. Bernie SandersBernie SandersProgressives rave over Harrison's start at DNC Zombie Tax punishes farmers to fill DC coffers Progressives threaten to block bipartisan infrastructure proposal MORE (I-Vt.), at fourth with 11 percent support.

In the July 2 poll, Harris had placed second, with 20 percent support, after confronting Biden over the former vice president's policy opposition to federally mandated busing during desegregation, while Warren was at third, with 14 percent support.

South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegHigh-speed rail getting last minute push in Congress Buttigieg: Bipartisan deal on infrastructure 'strongly preferred' OVERNIGHT ENERGY: Biden ends infrastructure talks with key Republican | Colonial Pipeline CEO grilled over ransomware attack | Texas gov signs bills to improve power grid after winter storm MORE (D) again placed fifth, polling at 6 percent. 

All other candidates in the crowded field are polling at 2 percent or less. 

The latest Quinnipiac poll was released just ahead the second presidential primary debates set to take place over Tuesday and Wednesday. 

The Democrats will face-off again in two debates this week, 10 on Tuesday and 10 on Wednesday, in Detroit. 

Sanders and Warren will be on the same stage the first night, while Biden and Harris will again be on stage together at Wednesday’s debate. 

The poll was conducted from July 25 to 28 and surveyed 1,306 voters nationwide. There is a 3.4 percentage point margin of error.