Fourth lens on the Board, coloring each county by the D/R balance of the
state + federal representatives who cover it — the offices that are
actually partisan (99% D/R coverage vs ~0% for nonpartisan local seats).
Pipeline (build_viz.py):
- Carry each district rep's party alongside their name through the
county<->district edge mapping.
- Per county, tally reps by party over districts covering >=5% of its
area (slivers excluded), and store lean = (R-D)/(R+D) in [-1,+1] plus
repD/repR counts. Head-count, not area-weighted, so the number matches
the readout and isn't skewed toward large rural districts. 3130/3131
counties resolve.
Board (board.html):
- "Partisan lean" lens with a diverging blue<->grey<->red ramp (centered
at 0, skipped in the percentile-rank machinery the other lenses use).
- Diverging legend (More Democratic / More Republican).
- Readout gains a Representation row (e.g. "8 D · 3 R D+45").
- Drill-down district reps get a D/R party badge.
Verified in preview: no console errors; Manhattan -1.0 (21D/0R), LA -0.46,
Palm Beach even (3D/3R), Loving TX +1.0; readout, color, and badges agree.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Fabio
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