This isn’t a 2020 primary poll, but it’s still relevant, as all of these people (except Bill Clinton and Barack Obama, who’re ineligible) seem to be floating a possible 2020 run….
Bloomberg national poll, conducted Dec. 2-5:
http://assets.bwbx.io/documents/users/iqjWHBFdfxIU/rOrpGo837s3s/v0Who should be the leading voice for the direction for the direction of the Democratic Party as it looks to rebuild?
all voters:
Sanders 20%
Obama 17%
Biden 14%
Warren 11%
B. Clinton 9%
H. Clinton 7%
Democrats only:
Obama 25%
Sanders 24%
Warren 17%
Biden 11%
H. Clinton 11%
B. Clinton 7%
Also, national favorability among all voters…
fav/unfav %:
Biden 56/34% for +22%
Sanders 53/34% for +19%
Warren 35/27% for +8%
Clinton 41/55% for -14%