Chart: Bernie Sanders Takes the Lead | Statista
KING 5 News poll: Biden edges Sanders days before Washington presidential primary | king5.com
Poll: Biden's lead narrows ahead of South Carolina primary - YouTube
New poll shows Bernie Sanders in the lead in California | KRON4
Compare Bernie Sanders and Joe Biden on the issues
Yahoo News/YouGov: Biden leads Sanders ahead of Michigan primary | YouGov
Why Bernie Sanders Is Electable, Too
One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
Warren, Biden in virtual dead heat in Saint Anselm College poll of NH primary voters
CNN Polls: Close race in California's Democratic primary while Biden tops in Texas | CNN Politics
CBS/YouGov Poll: Debate watchers believe Bernie Sanders made the best case for defeating Trump | YouGov
Bernie Sanders ahead of Joe Biden in Texas, new poll shows | FOX 5 San Diego
Warren Leads Tight Iowa Race as Biden Fades, Poll Finds - The New York Times
Why Bernie Sanders Is Electable, Too
Biden leads Sanders by 16 points in post-Super Tuesday poll
What Super Tuesday data tells us about who voted and why | PBS NewsHour
Sanders, Biden are neck-and-neck in new NBC/WSJ national poll
Chart: Biden Feeling the Bern | Statista
New poll shows Joe Biden as the leading 2020 Democratic candidate
Polls show Biden, Sanders and Warren at top of 2020 Democratic field - CBS News
CNN Poll of Polls: Biden and Sanders lead national Democratic primary | CNN Politics
Sanders Supporters Don't Love Joe Biden. How Much Will That Matter? - Morning Consult
How Joe Biden became the presumptive Democratic nominee — polling analysis - CBS News
Biden Tops Electability Ratings | Monmouth University Polling Institute | Monmouth University
New Polling Backs Up Leaked Trump Internals Showing Him Behind Joe Biden | Hardball | MSNBC - YouTube
Trump Competitive Against Candidates Not Named Biden, Sanders
New poll shows Joe Biden ahead of Bernie Sanders in Missouri presidential primary | FOX40
