Yahoo News/YouGov: Biden leads Sanders ahead of Michigan primary | YouGov
KQED Poll: Bernie Sanders Dominates the Field in California | KQED
WMUR/CNN poll: Sanders holds big lead over Clinton; Biden key factor
Compare Bernie Sanders and Joe Biden on the issues
Texas primary: Bernie Sanders, Joe Biden tied, poll says | kvue.com
Poll: Biden has a small edge over Sanders in Nevada – The Nevada Independent
Democratic poll: Biden has double-digit lead over Sanders | CNN Politics
One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
Don't Worry About the Democratic Presidential Polls | The New Yorker
Polls show Biden, Sanders and Warren at top of 2020 Democratic field - CBS News
USC Dornsife/LA Times poll: Biden is the favorite among likely voters at nearly 2:1 - Press Room USC
Sanders, Warren, Biden lead the Democratic Primary in California - Change Research
Biden Way Ahead in Sunshine State | FAU Business
Warren Leads Tight Iowa Race as Biden Fades, Poll Finds - The New York Times
Biden, Warren, Sanders stay on top; health is now an issue for Sanders: POLL - ABC News
New poll shows Sen. Bernie Sanders with double-digit lead in California | FOX 5 San Diego
Marquette poll: Bernie Sanders takes double-digit lead in Dem field
UMass poll gives Joe Biden, Bernie Sanders edge in 2020 New Hampshire Democratic primary - masslive.com
Biden, Sanders Have Nearly Identical Lead Over Trump in Hypothetical Matchup
Bernie Sanders ahead of Joe Biden in Texas, new poll shows | FOX 5 San Diego
KING 5 News poll: Biden edges Sanders days before Washington presidential primary | king5.com
Why Bernie Sanders Is Electable, Too
Chart: Biden Feeling the Bern | Statista
Biden leads Sanders by 16 points in post-Super Tuesday poll
Compare Bernie Sanders and Joe Biden on the issues
Chart: Biden Has Clear Lead Over Sanders, Trump | Statista
CBS/YouGov Poll: Debate watchers believe Bernie Sanders made the best case for defeating Trump | YouGov
2020 Democratic polls: Biden, Warren, Harris, Sanders on top in early contests, CBS News Battleground Tracker finds - CBS News
One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
NBC News poll: Biden holds narrow lead over Sanders in South Carolina
