U.S. elections drawn like weather charts: isolines connect counties of equal value.
Pick any two elections (House 2014–2026, President 2008–2024) to map the swing between them or
each county's deviation from the national swing — or show a single year's Dem–Rep margin.
Drag to pan, scroll to zoom, hover for county detail.
Alaska: at-large RCV result pending. Hawaiʻi: see the static maps in the repo.