Are they really more accurate? It's easy for people to leak and say they had special knowledge to make themselves look good. Biden might just have been playing it safe in Michigan since contesting the tipping point state is more important than contesting the closest state, and he did make a play for Ohio so he might just have had a slightly out of date view of the electoral map. How would we know what he was really thinking?
This is true, and we'll never know for sure, but I've been reading (very slowly, I'll add) that book Lucky, and the way they talk about the polls leads me to suspect that it's a well-known and accepted fact within the campaigns that these public polling firms are unreliable.
