One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
How Joe Biden became the presumptive Democratic nominee — polling analysis - CBS News
Biden and Bernie lead early polls, but don't place bets yet
New CNN poll puts Biden in the lead; Sanders and Warren behind by 10+ points - CBS News
KING 5 News poll: Biden edges Sanders days before Washington presidential primary | king5.com
How Biden, Warren and Sanders fare vs. Trump in 2020 election polls
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2020 Daily Trail Markers: New poll shows Sanders, Biden, and Buttigieg fighting for lead in Iowa - YouTube
CBS News poll: Bernie Sanders, Joe Biden, Pete Buttigieg tied in Iowa - CBS News
Joe Biden holds the largest lead over President Donald Trump in battleground states | YouGov
Biden leads Sanders by 16 points in post-Super Tuesday poll
Fox News poll shows top Democratic candidates beating Trump
KQED Poll: Bernie Sanders Dominates the Field in California | KQED
Warren, Biden in virtual dead heat in Saint Anselm College poll of NH primary voters
Biden Boasts 16-Point Lead Over Sanders in Democratic Presidential Race - Morning Consult
Biden Way Ahead in Sunshine State | FAU Business
Chart: Sanders Perceived as the Most Honest Candidate | Statista
Feb. 27, 2020 Press Release | Department of Political Science | UMass Amherst
Bernie Sanders ahead of Joe Biden in Texas, new poll shows | KXAN Austin
Polls show Biden, Sanders and Warren at top of 2020 Democratic field - CBS News
It's still Biden and Sanders jockeying for the heart and soul of the Democratic Party
Florida polling average: Joe Biden leads Bernie Sanders by a mile
One Year From Election, Trump Trails Biden but Leads Warren in Battlegrounds - The New York Times
Emerson College poll shows Joe Biden with double-digit lead in S.C. ahead of primary
Joe Biden remains the Democratic favorite among likely voters
