Polls Weighted by Modeled Partisanship

This pollster now weights surveys not only by demographics and past vote, but also by Catalist’s modeled partisanship (Vote Choice Index) within race, age, and gender cells. The aim is to correct nonresponse skews (e.g., partisan answer gaps) that warped polls in recent cycles. Such proprietary model‑based weights can shift toplines versus traditional demographic weighting. — Weighting by modeled partisanship could change election narratives and raises transparency questions about how private data models shape public polling.