Biden, Sanders top poll of possible Democratic presidential hopefuls

Former Vice President Joe BidenJoe BidenFive takeaways from the Ohio special primaries FDA aims to give full approval to Pfizer vaccine by Labor Day: report Overnight Defense: Police officer killed in violence outside Pentagon | Biden officials back repeal of Iraq War authorization | NSC pushed to oversee 'Havana Syndrome' response MORE and Sen. Bernie SandersBernie SandersFive takeaways from the Ohio special primaries Briahna Joy Gray: Voters are 'torn' over Ohio special election Shontel Brown wins Ohio Democratic primary in show of establishment strength MORE (I-Vt.) are the most popular potential 2020 Democratic presidential candidates, according to a new American Barometer poll. 

The poll, which is a joint project of Hill.TV and the HarrisX polling company, showed Biden with a 50 percent favorable rating, while Sanders trailed with a 48 percent favorable rating. 

Only 31 percent of those polled said they viewed the former vice president unfavorably. A third of respondents said they viewed Sanders unfavorably. 

The survey comes as speculation swirls around a slew of potential Democratic contenders, including Sens. Kirsten GillibrandKirsten GillibrandThe Memo: Disgraced Cuomo clings to power Biden calls on Cuomo to resign after harassment probe Pelosi calls for Cuomo's resignation MORE (N.Y.), Kamala HarrisKamala HarrisKamala Harris and our shameless politics Pelosi: House Democrats 'ready to work with' Biden on eviction ban Meghan McCain predicts DeSantis would put Harris 'in the ground' in 2024 matchup MORE (Calif.), Elizabeth WarrenElizabeth WarrenStaff seeks to create union at DNC America's middle class is getting hooked on government cash — and Democrats aren't done yet California Democrats warn of low turnout in recall election MORE (Mass.) and Cory BookerCory BookerWomen urge tech giants to innovate on office return Human rights can't be a sacrificial lamb for climate action Senate Democrats press administration on human rights abuses in Philippines MORE (N.J.), who could challenge President TrumpDonald TrumpFive takeaways from the Ohio special primaries Missouri Rep. Billy Long enters Senate GOP primary Trump-backed Mike Carey wins GOP primary in Ohio special election MORE in 2020. 

Warren held the highest favorable rating among Democratic senators listed in the survey, with 33 percent of those polled saying they held a favorable view of the senator.

The poll showed Gillibrand holding a 20 percent favorable rating, while 21 percent of respondents said they have a favorable view of Harris, and 23 percent said the same for Booker.  

Name recognition remains an obstacle for many Democratic contenders. 

Thirty-four percent of respondents said they had never heard of Gillibrand, while 36 percent said the same for Harris. Thirty-two percent of respondents had not heard of Booker.

Only 4 percent of those polled said they had never heard of Biden or Sanders. 

Democratic pollster Margie Omero urged caution when speculating about current 2020 polling. Omero said that much could change before the presidential election. 

"I remember lots of green room snickering over Bernie Sanders in September before the [2016 Democratic] primary," Omero told Hill.TV's Jamal Simmons on "What America's Thinking" Friday. “A lot can change. That doesn’t mean that Joe Biden doesn’t have an advantage."

“I think there are going to be a lot of Democrats who are going to feel torn because there are so many exciting candidates from which to choose," she continued. 

The survey was conducted July 21–22 among 1,001 registered voters. 

— Julia Manchester