The main difference between our polls and recent national polls, to me, stems from two things.
1) The EC-battleground gap, which was 4 points in '16 and could easily grow in '20, esp among RVs. This is basically what we thought the result should look like, back in July pic.twitter.com/LfnEI45ElY

— Nate Cohn (@Nate_Cohn) November 4, 2019