… Polling can sometimes make your head spin. Depending on which poll you looked at post-debate, you find Biden and Harris within the margin of error of each other or Biden more than doubling Harris’ support. Likewise, you could see Sanders in a rather clear second place or in fourth place.
The simplest and best thing to do when polls differ like this is to take an average. Sometimes one of the polls will be wrong and one will be right, but most often the truth is in the middle. CONT.
Harry Enten, CNN
Recent polls: Democratic presidential preference