Warren, Biden in virtual dead heat in Saint Anselm College poll of NH primary voters
Trump Competitive Against Candidates Not Named Biden, Sanders
Chart: Biden Feeling the Bern | Statista
Biden leads Sanders by 16 points in post-Super Tuesday poll
USC Dornsife/LA Times poll: Biden is the favorite among likely voters at nearly 2:1 - Press Room USC
Yahoo News/YouGov: Biden leads Sanders ahead of Michigan primary | YouGov
One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
Compare Bernie Sanders and Joe Biden on the issues
CBS/YouGov Poll: Debate watchers believe Bernie Sanders made the best case for defeating Trump | YouGov
Texas primary: Bernie Sanders, Joe Biden tied, poll says | kvue.com
New poll shows Joe Biden ahead of Bernie Sanders in Missouri presidential primary | FOX40
Polls show Biden, Sanders and Warren at top of 2020 Democratic field - CBS News
Compare Bernie Sanders and Joe Biden on the issues
How Joe Biden became the presumptive Democratic nominee — polling analysis - CBS News
WMUR/CNN poll: Sanders holds big lead over Clinton; Biden key factor
Biden, Warren, Sanders stay on top; health is now an issue for Sanders: POLL - ABC News
CNN Poll of Polls: Biden and Sanders lead national Democratic primary | CNN Politics
New poll shows Bernie Sanders in the lead in California | KRON4
KING 5 News poll: Biden edges Sanders days before Washington presidential primary | king5.com
Sanders Supporters Don't Love Joe Biden. How Much Will That Matter? - Morning Consult
2020 Democratic polls: Biden, Warren, Harris, Sanders on top in early contests, CBS News Battleground Tracker finds - CBS News
Warren Leads Tight Iowa Race as Biden Fades, Poll Finds - The New York Times
USC Dornsife/LA Times poll: Biden is the favorite among likely voters at nearly 2:1 - Press Room USC
