Polarization VII — Geographic Polarization

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Slide for slide the same as the PowerPoint, with the same numbers and the same speaker notes: both are drawn from one file. Most slides build a piece at a time on →: a map's numbers arrive one by one, and side-by-side maps one map at a time.

Every map and number is rebuilt from public data (county returns 2000–2024, the New York Times 2024 precinct file, each state's new district lines, and Brown & Enos's replication files) by 2026-09-29-geo-descriptives.R and 2026-09-29-geo-districts.R, except slides marked reported from the article.

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