Interesting to look at the candidates by favourability in this poll, they even asked about Obama and Romney
Trump 46/50
Biden 39/48
Warren 29/46
Sanders 36/54
Obama 54/41
Romney 28/44
The numbers are worse for Biden than I thought they would be, the numbers are about as bad for Sanders and Warren as expected. Not surprisingly Obama is above water.
Harry Enten has said this sample is more favourable for Trump than the previous poll but the sample in their October poll was 31R/29D/30I or a R+2 sample, the sample in their current poll is 28R/28D/40I so its 2% less Republican and in all other areas like education, age and income its identical.
I think Enten meant that the democrats in the sample were more favorable to Trump, i.e, that impeachment fell by about ten points amongst democrats even though there are no signs of that nationally(ignoring the Emerson poll).
Still, those favorbility ratings are horrific for everyone. Biden's numbers will probably recover a smidge once he wins the nomination and democrats get behind him. But Sander's numbers are probably worse than Hillary's were, and Warren's will be too once her name I.D is 100%.