Weight polls by party or past vote

Pollsters should routinely adjust (weight) survey results to match respondents' political party affiliation or reported past vote to correct systematic partisan nonresponse and reduce poll‑to‑poll volatility. Pew shows response rates have fallen to single digits (panels ~3%), and emerging evidence that Republicans are now slightly less likely to respond has caused recurring underestimates of Republican performance in recent presidential cycles. — If widely adopted, this practice changes how media and campaigns interpret polls, affects public expectations about polling accuracy, and bears on claims that polls are skewed or unreliable.