UMass Amherst/WCVB Poll: African American voters seeking candidate who can beat Trump
2020 Poll: Biden, Sanders Lead Democratic Race To Take On Trump For President : NPR
UMass poll gives Joe Biden, Bernie Sanders edge in 2020 New Hampshire Democratic primary - masslive.com
South Carolina primary: Joe Biden leads Bernie Sanders in NBC-Marist poll
Biden, Warren, Sanders stay on top; health is now an issue for Sanders: POLL - ABC News
New CNN poll puts Biden in the lead; Sanders and Warren behind by 10+ points - YouTube
KQED Poll: Bernie Sanders Dominates the Field in California | KQED
Bernie Sanders, Joe Biden, Elizabeth Warren lead new California poll
Bernie Sanders is now tied with Joe Biden Reuters poll
Chart: Bernie Sanders Takes the Lead | Statista
Poll: Bernie, Warren surge to tie Biden atop Democratic field - POLITICO
New poll shows Joe Biden ahead of Bernie Sanders in Missouri presidential primary | FOX40
Sanders, Biden are neck-and-neck in new NBC/WSJ national poll
Polls show Biden, Sanders and Warren at top of 2020 Democratic field - CBS News
New poll shows Sen. Bernie Sanders with double-digit lead in California | FOX 5 San Diego
Biden And Sanders Amp Up Criticism As Polls Show Edging Ahead In Democratic Race : NPR
Biden, Sanders Are Running Neck and Neck in Nationwide Poll - Bloomberg
Trump Competitive Against Candidates Not Named Biden, Sanders
Emerson Polling - National Poll: Sanders Tied with Biden; O'Rourke Gets Post-Announcement Bump
Bernie Sanders ahead of Joe Biden in Texas, new poll shows | KXAN Austin
Biden holds double-digit lead over Sanders nationally: poll | The Hill
NH poll shows Biden, Sanders maintaining lead as Buttigieg makes surge
Biden Boasts 16-Point Lead Over Sanders in Democratic Presidential Race - Morning Consult
Bernie Sanders leads Pa. primary in poll, with close race against Trump
