2024-weighted polls can mask turnout shifts

Polls that weight respondents to the 2024 presidential vote and past turnout risk understating or misreading current electorate changes between presidential and midterm years. When a poll (here: Economist/YouGov Sept 18–21, 2026) reports a large partisan gap but uses 2024 vote and turnout as weighting anchors, that gap may reflect both opinion movement and the weighting assumptions rather than pure current preference. — If pollsters keep anchoring samples to a past presidential electorate, public and campaign narratives about who is 'ahead' can be distorted and misdirect turnout and messaging strategies.