This chart reflects the results of a recent Millsaps College / Chism Strategies Survey. It was done on June 20th and 21st of a sample of 523 Mississippi Democratic voters, and has a margin of error of 4.27 points.
Joe Biden has a huge lead in Mississippi. He has solid support from 43.18% and another 6.83% are leaning toward him (for a total of 50.01%). No other candidate even has double figures.
Will this change after the debates? We shall see.