Likely‑voter definition swings polls

Updated: 2026.10.06 1H ago 1 sources
Poll margins can change substantially depending on how pollsters define 'likely voters' (for example: registered voters = +8 D, strict likely voters = +12 D, loose likely voters = +10 D, an old screen = +16 D). These operational choices bias which demographics are weighted (younger people, soft partisans) and therefore reshape the public story about who is winning. — Poll methodology (the specific likely‑voter screen used) is itself a political lever because it changes headlines, campaign tactics, and public expectations about the race.

Sources

Democrats lead by double digits in each of the two new ways we define likely voters
2026.10.06 100% relevant
Economist/YouGov poll results: registered voters = Democrats +8; strict likely voters = Democrats +12; loose likely voters = Democrats +10; YouGov retired an older screen that produced +16 for Democrats.
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