Democrats and Democratic leaners were asked which of these candidates they would consider voting for in 2024 if they run. (You’re allowed to pick multiple names, which is why this adds up to way more than 100%.)
https://www.surveymonkey.com/curiosity/axiossurveymonkey-2024-presidential-vote-for-democrats/Buttigieg 30%
Harris 26%
Booker 24%
Ocasio-Cortez 20%
Winfrey 20%
Abrams 18%
Klobuchar 18%
Joe Kennedy 14%
Newsom 10%
Bennet 7%
Emanuel 5%
McAuliffe 5%
Bullock 4%
Roy Cooper 4%
Lori Lightfoot 4%
Whitmer 3%
Landrieu 3%
Schatz 3%
Raimondo 2%
other 19%
no answer 11%
Presumably this is in a hypothetical world where Trump is reelected this time, so it would be an open field on the Dem. side in 2024.