When asked whom they would support from a list of 20 candidates – including 'someone else' – 29% named Sanders, and 24% named Biden in an Emerson College poll released Monday.
In a head-to-head matchup with President Donald Trump, Biden still performed the best in the Emerson poll, leading the incumbent 53% to 47%. But that was a slide from the college's poll in March in which he topped Trump 55% to 45%.
Sanders edged out Trump 51% to 48%, and Harris tied him in a hypothetical matchup. The rest of the Democratic field trailed Trump, who had a 43% approval rating among respondents.