Reuters/Ipsos national poll, conducted Jan. 31 - Feb. 3:
https://www.ipsos.com/sites/default/files/ct/news/documents/2020-02/topline_reuters_2020_election_tracker_02_03_2020.pdfAs is usual with this pollster, it looks like their combined sample for the Dem. primary consists of all Dems + all Independents (regardless of whether they’re Dem-leaning Independents or not). So their combined sample of Dems + Indies gives this:
Biden 22%
Sanders 19%
Warren 10%
Bloomberg 9%
Buttigieg 5%
Klobuchar 4%
Yang 4%
Steyer 3%
Steyer 3%
Gabbard 1%
Bennet 1%
Patrick 0%
But the Dems-only sample might be more relevant, and it’s:
Biden 27%
Sanders 21%
Warren 12%
Bloomberg 9%
Buttigieg 6%
Klobuchar 5%
Yang 4%
Steyer 3%
Gabbard 1%
Bennet 1%
Patrick 0%