Biden remains top for Democratic 2020 nominees, but O'Rourke gains while Harris and Warren shrink

Possible Democratic candidates
Dec. 6-9, 2018
Oct. 4-7, 2018
Former Vice President Joe Biden 30% 33%
Vermont Senator Bernie Sanders 14% 13%
Texas Congressman Beto O’Rourke 9% 4%
New Jersey Senator Cory Booker 5% 5%
California Senator Kamala Harris 4% 9%
Former Secretary of State John Kerry 4% 5%
Massachusetts Senator Elizabeth Warren 3% 8%
Former New York City Mayor Michael Bloomberg 3% 4%
Minnesota Senator Amy Klobuchar 3% 1%
Former Attorney General Eric Holder 1% 3%
New York Senator Kirstin Gillibrand 1% 1%
Montana Governor Steve Bullock 1% *
Ohio Senator Sherrod Brown 1% N/A
Washington Governor Jay Inslee 1% N/A
Former Virginia Governor Terry McAuliffe 1% N/A
Los Angeles Mayor Eric Garcetti * 2%
Former Housing and Urban Development Secretary Julian Castro * N/A
Colorado Governor John Hickenlooper * N/A
Maryland Congressman John Delaney 0% *
Businessman Tom Steyer 0% N/A
Attorney Michael Avenatti N/A 1%
Former Massachusetts Governor Deval Patrick N/A 1%
Someone else (vol.) 2% 2%
None/No one (vol.) 8% 2%
No opinion 9% 6%