Draw a shape
Tap or click the map to drop polygon points, then tap the first point (or press Enter) to close. As you draw, the counties your shape covers are highlighted as a running estimate. The saved figures sum every county the polygon intersects — in full, not area-weighted — across every presidential cycle from 1876 to 2024.
Saving requires a free account. Sign in below to keep a shape and get a shareable link.
Tap empty space to add a point · drag a point to move it · tap an edge dot to insert · tap a point then Delete to remove · tap the first point or Close to finish. Keyboard (focus the map): arrows move a cursor · Space drops a point · Enter close · Esc deselect / reset · Ctrl/Cmd-Z undo · Ctrl/Cmd-Shift-Z redo.