CNN 2020 Democratic Nominee Poll (change from June):

Biden 29 (+7)
Sanders 15 (+2)
Warren 14 (-1)
Buttigieg 5 (+1)
Harris 5 (-12)
Beto 3 (same)
Booker 2 (-1)
Castro 2 (+1)
Gabbard 2 (+1)

A horrible poll for Harris, who peaked after the first debate and has been sliding since.

— The Darkest Timeline Numbersmuncher (@NumbersMuncher) August 20, 2019