From Morningconsult.com:
Our Democratic Primary results are reported using15,642 interviews with registered voters who indicate they may vote in the Democratic primary or caucus. For those who say don’t know or no opinion, they are asked to pick a candidate they arelearning towards, which are factored into the results. The margin of error for potential Democratic primary voters is +/- 1%.
These two charts are from the Morning Consult Poll. Even though he has yet to officially enter the presidential race, Joe Biden leads all other candidates -- in the nation as a whole, and in the early primary states.
