Chart: Bernie Sanders Takes the Lead | Statista
KQED Poll: Harris Slips in California, as Warren, Sanders and Biden Lead the Pack | KQED
Biden leads Sanders by 16 points in post-Super Tuesday poll
Biden, Warren and Sanders top 3 national polls - POLITICO
Lyceum poll: Bernie is Trump's toughest rival in Texas
One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
Biden Boasts 16-Point Lead Over Sanders in Democratic Presidential Race - Morning Consult
Weighing Biden vs. Sanders? Compare where they stand on key issues | PBS NewsHour
Iowa Poll: Biden, Sanders top early look at possible 2020 caucus field
Saint Anselm poll: Buttigieg surges to 10 percentage point lead over Biden, Warren in NH
One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
Bernie Sanders surges to join Biden atop Democratic presidential pack in new poll | CNN Politics
Bernie Sanders, Joe Biden, Elizabeth Warren lead new California poll
KQED Poll: Bernie Sanders Dominates the Field in California | KQED
Bernie Sanders is now tied with Joe Biden Reuters poll
Sanders, Biden are neck-and-neck in new NBC/WSJ national poll
Biden And Sanders Amp Up Criticism As Polls Show Them Separating From Field - capradio.org
Trump Competitive Against Candidates Not Named Biden, Sanders
2020 Poll: Biden, Sanders Lead Democratic Race To Take On Trump For President : NPR
Election Update: Two New Polls Show Biden's Upside Scenario | FiveThirtyEight
Biden, Sanders other Democrats lead Trump in Michigan, poll finds
New poll shows Joe Biden ahead of Bernie Sanders in Missouri presidential primary | FOX40
Bernie Sanders Is Out-Polling Joe Biden
CNN Poll of Polls: Biden and Sanders lead national Democratic primary | CNN Politics
Joe Biden 2020: Election News, Polls for President, Fundraising, Campaign, Opponents, Results & More - POLITICO
March 10th: Another Good Night for Joe Biden - Edison Research
Biden, Warren, Sanders stay on top; health is now an issue for Sanders: POLL - ABC News
