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Chance a Republican wins (>99.9%)
We'll be updating our forecasts every time new data is available, every day through Nov. 6.
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Our district similarity scores are based on demographic, geographic and political characteristics; if two districts have a score of 100, it means they are perfectly identical. These scores inform a system we use — CANTOR, or Congressional Algorithm using Neighboring Typologies to Optimize Regression — to infer what polling would say in unpolled or lightly polled districts, given what it says in similar districts.
|Sim. score||Polling avg.|
The Classic and Deluxe versions of our model use several non-polling factors to forecast the vote share margin in each district.
|As of Oct. 17, Paul Cook had raised $283,000 in individual contributions (61% of all such contributions to the major-party candidates); Tim Donnelly had raised $177,000 (39%).|
|Top-two primary margin|
|Cook won the June primary by 17.9 percentage points.|
Nate Silver explains the methodology behind our 2018 midterms forecast. Read more …