KING 5 News poll: Biden edges Sanders days before Washington presidential primary | king5.com
Elizabeth Warren and Joe Biden drop in new 2020 poll - Los Angeles Times
Texas primary: Bernie Sanders, Joe Biden tied, poll says | kvue.com
2020 Democratic polls: Biden, Warren, Harris, Sanders on top in early contests, CBS News Battleground Tracker finds - CBS News
NBC News poll: Biden holds narrow lead over Sanders in South Carolina
Feb. 27, 2020 Press Release | Department of Political Science | UMass Amherst
Bernie Sanders, Joe Biden, Elizabeth Warren lead new California poll
Bernie Sanders ahead of Joe Biden in Texas, new poll shows | KXAN Austin
Warren, Biden in virtual dead heat in Saint Anselm College poll of NH primary voters
National poll: Biden, Warren and Sanders locked together at top of primary - POLITICO
Biden, Sanders Are Running Neck and Neck in Nationwide Poll - Bloomberg
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Bernie Sanders leads Joe Biden in national ranked-choice poll — but it's close - Vox
UT/TT Poll: Sanders and Biden Lead Texas Democratic Presidential Nomination Race; Trump Impeachment Trial Leaves Texans' Views Unwavering - UT News
How United Are Democrats? A 96-0 Data Point Offers a Hint - The New York Times
Polls show Biden, Sanders and Warren at top of 2020 Democratic field - CBS News
USC Dornsife/LA Times poll: Biden is the favorite among likely voters at nearly 2:1 - Press Room USC
Chart: Bernie Sanders Takes the Lead | Statista
Biden, Warren, Sanders stay on top; health is now an issue for Sanders: POLL - ABC News
How Biden, Warren and Sanders fare vs. Trump in 2020 election polls
Emerson Polling - August National Poll: Sanders Closing Gap with Biden; Mayor Pete Fades
New poll shows Joe Biden ahead of Bernie Sanders in Missouri presidential primary | FOX 4 Kansas City WDAF-TV | News, Weather, Sports
One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
Biden, Warren and Sanders top 3 national polls - POLITICO
KQED Poll: Harris Slips in California, as Warren, Sanders and Biden Lead the Pack | KQED
