>> It is not clear that Republican pollsters did any better
I did not read the whole report yet (I am interested in statistics of the issue), I saw this phrase and it does sound like a weaseling phrase “it is not clear” rather than “there is no difference”. Prior to each of the last 3 elections, there was clear difference between lefty/”mainstream” and more sympathetic to right wing pollsters. So, there should be difference at the end. Let me get to read that.
As I said, intentionality may not have been proven. But this is now a fashionable trend – you are an implicit racist if you don;t perfectly balance your race-blind hiring to exact race quotas. Same here – if your polls are always wrong same way … I almost said – good for goose/gander, but realized that this would be also verboten.