Joe Biden holds the largest lead over President Donald Trump in battleground states | YouGov
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
Sanders, Biden are neck-and-neck in new NBC/WSJ national poll
USC Dornsife/LA Times poll: Biden is the favorite among likely voters at nearly 2:1 - Press Room USC
CNN 2020 poll: Joe Biden has double-digit lead over Bernie Sanders - CNN Video
Biden, Warren, Sanders stay on top; health is now an issue for Sanders: POLL - ABC News
Compare Bernie Sanders and Joe Biden on the issues
Biden, Sanders Have Nearly Identical Lead Over Trump in Hypothetical Matchup
Sanders Supporters Don't Love Joe Biden. How Much Will That Matter? - Morning Consult
Bernie Sanders supporters not yet on board with voting for Joe Biden
Texas primary: Bernie Sanders, Joe Biden tied, poll says | kvue.com
2020 Democratic polls: Biden, Warren, Harris, Sanders on top in early contests, CBS News Battleground Tracker finds - CBS News
Democrats see Biden and Sanders as very different ideologically | Pew Research Center
One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
Biden Way Ahead in Sunshine State | FAU Business
Sanders Seizes Lead in Volatile Iowa Race, Times Poll Finds - The New York Times
Warren Leads Tight Iowa Race as Biden Fades, Poll Finds - The New York Times
Biden And Sanders Amp Up Criticism As Polls Show Edging Ahead In Democratic Race : NPR
Chart: Bernie Sanders Takes the Lead | Statista
On Super Tuesday “Gaps” - Edison Research
