New CNN poll puts Biden in the lead; Sanders and Warren behind by 10+ points - YouTube
CNN Poll of Polls: Biden and Sanders lead national Democratic primary | CNN Politics
How Joe Biden became the presumptive Democratic nominee — polling analysis - CBS News
Sanders Takes Lead, Buttigieg and Biden Vie For Second | Monmouth University Polling Institute | Monmouth University
:no_upscale()/cdn.vox-cdn.com/uploads/chorus_asset/file/19218192/Screen_Shot_2019_09_20_at_3.04.06_PM.png "Election 2020: Biden, Sanders, and Warren poll best against Trump - Vox")
Election 2020: Biden, Sanders, and Warren poll best against Trump - Vox
Bernie Sanders beats Joe Biden in national polls as candidates clash over social security | The Independent | The Independent
One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
Sanders Seizes Lead in Volatile Iowa Race, Times Poll Finds - The New York Times
Bloomberg qualifies for debate, Sanders leads ahead of Nevada caucuses | PBS NewsHour
Emerson Polling - National 2020: Biden and Sanders Battle in Two-Way Race for Democratic Nomination
NBC News/Marist polls: Biden holds big leads over Sanders in Arizona and Ohio
On Super Tuesday “Gaps” - Edison Research
WMUR/CNN poll: Clinton suddenly in a tight battle with Sanders in NH
Bernie Sanders endorses Biden, rules out 2024 bid of his own | AP News
Chart: Biden Feeling the Bern | Statista
New poll shows Joe Biden ahead of Bernie Sanders in Missouri presidential primary | FOX 4 Kansas City WDAF-TV | News, Weather, Sports
Chart: Bernie Sanders Takes the Lead | Statista
Bernie Sanders ahead of Joe Biden in Texas, new poll shows | KXAN Austin
New Yahoo News/YouGov poll shows Biden crushing Sanders in Michigan and other battleground states ahead of Tuesday's primary
One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
Bernie Sanders endorses Biden for 2024, forgoing another election run | The Times of Israel
Poll: Biden outpacing Sanders and Warren to remain the Democratic favorite
Feb. 27, 2020 Press Release | Department of Political Science | UMass Amherst
Election Update: We Got A Flurry Of New National Polls. Sanders Led Them All. | FiveThirtyEight
Polls: Bernie Sanders in control over Joe Biden, Mike Bloomberg
