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Nate Silver @NateSilver538
So, pick your hypothesis: 1) Party ID is very stable, so big shifts reflect nonresponse bias 2) Party ID is usually fairly stable, so a big shift like this is really bad for Ds 3) Party ID isn't that stable, so this doesn't tell us any more than e.g. shifts in Biden approval — PolitiTweet.org
Bruce Mehlman @bpmehlman
Big shift in Party ID in 2021: GOP +7, DEM -7 https://t.co/11kePOv8D4 https://t.co/OsPsbAY5p5