Add elections + demographics layer: candidates and jurisdictions

Two new entity types, built deterministically from the raw exports:

  Candidate (2,494)     — 2026 federal candidates as files under
                          us/states/<st>/candidates/, with office,
                          district, party, incumbent/challenger stance,
                          campaign committee, FEC id.

  Jurisdiction (3,494)  — demographic nodes carrying ACS 2023 data:
                          3,131 counties (deduped from 3,231 mixed-format
                          fips keys) + 363 congressional districts.

This completes the county skeleton nationwide: every US county is now a
browsable node with population, income, poverty, race, education and
housing — even where no officeholders are mapped yet. In Florida the
county index.md merges into the existing dir and reports its officeholder
count alongside demographics (St. Lucie: 33 officeholders + ACS profile).

build.py now reads seven raw inputs in one deterministic pass
(byte-identical on rerun). The mirror now answers: who holds power, who
runs this institution, who is running, and what each place is made of.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

data/jurisdictions/us/states/il/districts/11.md

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+---
+type: Jurisdiction
+title: "IL-11"
+classification: congressional-district
+state: "IL"
+district: "IL-11"
+demographics:
+  population: 766584
+  population_under_18: 188050
+  population_18_64: 249817
+  population_65_plus: 328717
+  median_household_income: 108620
+  poverty_rate: 7.26
+  homeownership_rate: 75.61
+  unemployment_rate: 3.97
+  median_home_value: 370400
+  gini_index: 0.4439
+  vacancy_rate: 3.44
+  race_white: 493785
+  race_black: 44591
+  race_asian: 73612
+  hispanic: 153415
+  bachelors_plus: 245812
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, il]
+timestamp: "2026-07-03"
+---
+
+# IL-11
+
+Congressional district IL-11.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 766584 |
+| Under 18 | 188050 |
+| 18–64 | 249817 |
+| 65+ | 328717 |
+| Median household income | 108620 |
+| Poverty rate | 7.26 |
+| Homeownership rate | 75.61 |
+| Unemployment rate | 3.97 |
+| Median home value | 370400 |
+| Gini index | 0.4439 |
+| Vacancy rate | 3.44 |
+| White | 493785 |
+| Black | 44591 |
+| Asian | 73612 |
+| Hispanic/Latino | 153415 |
+| Bachelor's or higher | 245812 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/il/districts/12.md

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+---
+type: Jurisdiction
+title: "IL-12"
+classification: congressional-district
+state: "IL"
+district: "IL-12"
+demographics:
+  population: 745901
+  population_under_18: 178402
+  population_18_64: 224149
+  population_65_plus: 343350
+  median_household_income: 70903
+  poverty_rate: 12.27
+  homeownership_rate: 76.35
+  unemployment_rate: 4.23
+  median_home_value: 158800
+  gini_index: 0.4437
+  vacancy_rate: 11.16
+  race_white: 649506
+  race_black: 39886
+  race_asian: 8006
+  hispanic: 21393
+  bachelors_plus: 128277
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, il]
+timestamp: "2026-07-03"
+---
+
+# IL-12
+
+Congressional district IL-12.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 745901 |
+| Under 18 | 178402 |
+| 18–64 | 224149 |
+| 65+ | 343350 |
+| Median household income | 70903 |
+| Poverty rate | 12.27 |
+| Homeownership rate | 76.35 |
+| Unemployment rate | 4.23 |
+| Median home value | 158800 |
+| Gini index | 0.4437 |
+| Vacancy rate | 11.16 |
+| White | 649506 |
+| Black | 39886 |
+| Asian | 8006 |
+| Hispanic/Latino | 21393 |
+| Bachelor's or higher | 128277 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/il/districts/13.md

@@ -0,0 +1,59 @@
+---
+type: Jurisdiction
+title: "IL-13"
+classification: congressional-district
+state: "IL"
+district: "IL-13"
+demographics:
+  population: 741808
+  population_under_18: 174044
+  population_18_64: 269480
+  population_65_plus: 298284
+  median_household_income: 64968
+  poverty_rate: 15.98
+  homeownership_rate: 62.17
+  unemployment_rate: 4.41
+  median_home_value: 167800
+  gini_index: 0.4594
+  vacancy_rate: 10.4
+  race_white: 491916
+  race_black: 141836
+  race_asian: 34489
+  hispanic: 43940
+  bachelors_plus: 170665
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, il]
+timestamp: "2026-07-03"
+---
+
+# IL-13
+
+Congressional district IL-13.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 741808 |
+| Under 18 | 174044 |
+| 18–64 | 269480 |
+| 65+ | 298284 |
+| Median household income | 64968 |
+| Poverty rate | 15.98 |
+| Homeownership rate | 62.17 |
+| Unemployment rate | 4.41 |
+| Median home value | 167800 |
+| Gini index | 0.4594 |
+| Vacancy rate | 10.4 |
+| White | 491916 |
+| Black | 141836 |
+| Asian | 34489 |
+| Hispanic/Latino | 43940 |
+| Bachelor's or higher | 170665 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/il/districts/14.md

@@ -0,0 +1,59 @@
+---
+type: Jurisdiction
+title: "IL-14"
+classification: congressional-district
+state: "IL"
+district: "IL-14"
+demographics:
+  population: 766577
+  population_under_18: 192639
+  population_18_64: 258490
+  population_65_plus: 315448
+  median_household_income: 98492
+  poverty_rate: 8.42
+  homeownership_rate: 77.5
+  unemployment_rate: 5.19
+  median_home_value: 301300
+  gini_index: 0.4173
+  vacancy_rate: 3.4
+  race_white: 460716
+  race_black: 64508
+  race_asian: 49910
+  hispanic: 189206
+  bachelors_plus: 191171
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, il]
+timestamp: "2026-07-03"
+---
+
+# IL-14
+
+Congressional district IL-14.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 766577 |
+| Under 18 | 192639 |
+| 18–64 | 258490 |
+| 65+ | 315448 |
+| Median household income | 98492 |
+| Poverty rate | 8.42 |
+| Homeownership rate | 77.5 |
+| Unemployment rate | 5.19 |
+| Median home value | 301300 |
+| Gini index | 0.4173 |
+| Vacancy rate | 3.4 |
+| White | 460716 |
+| Black | 64508 |
+| Asian | 49910 |
+| Hispanic/Latino | 189206 |
+| Bachelor's or higher | 191171 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/il/districts/15.md

@@ -0,0 +1,59 @@
+---
+type: Jurisdiction
+title: "IL-15"
+classification: congressional-district
+state: "IL"
+district: "IL-15"
+demographics:
+  population: 739197
+  population_under_18: 170187
+  population_18_64: 213000
+  population_65_plus: 356010
+  median_household_income: 74855
+  poverty_rate: 9.91
+  homeownership_rate: 78.76
+  unemployment_rate: 3.33
+  median_home_value: 164200
+  gini_index: 0.4357
+  vacancy_rate: 8.99
+  race_white: 664146
+  race_black: 19240
+  race_asian: 6981
+  hispanic: 24242
+  bachelors_plus: 145625
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, il]
+timestamp: "2026-07-03"
+---
+
+# IL-15
+
+Congressional district IL-15.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 739197 |
+| Under 18 | 170187 |
+| 18–64 | 213000 |
+| 65+ | 356010 |
+| Median household income | 74855 |
+| Poverty rate | 9.91 |
+| Homeownership rate | 78.76 |
+| Unemployment rate | 3.33 |
+| Median home value | 164200 |
+| Gini index | 0.4357 |
+| Vacancy rate | 8.99 |
+| White | 664146 |
+| Black | 19240 |
+| Asian | 6981 |
+| Hispanic/Latino | 24242 |
+| Bachelor's or higher | 145625 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/il/districts/16.md

@@ -0,0 +1,59 @@
+---
+type: Jurisdiction
+title: "IL-16"
+classification: congressional-district
+state: "IL"
+district: "IL-16"
+demographics:
+  population: 752764
+  population_under_18: 182029
+  population_18_64: 221467
+  population_65_plus: 349268
+  median_household_income: 85435
+  poverty_rate: 7.71
+  homeownership_rate: 80.18
+  unemployment_rate: 3.59
+  median_home_value: 211200
+  gini_index: 0.4138
+  vacancy_rate: 6.49
+  race_white: 635057
+  race_black: 17772
+  race_asian: 18909
+  hispanic: 58449
+  bachelors_plus: 169888
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, il]
+timestamp: "2026-07-03"
+---
+
+# IL-16
+
+Congressional district IL-16.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 752764 |
+| Under 18 | 182029 |
+| 18–64 | 221467 |
+| 65+ | 349268 |
+| Median household income | 85435 |
+| Poverty rate | 7.71 |
+| Homeownership rate | 80.18 |
+| Unemployment rate | 3.59 |
+| Median home value | 211200 |
+| Gini index | 0.4138 |
+| Vacancy rate | 6.49 |
+| White | 635057 |
+| Black | 17772 |
+| Asian | 18909 |
+| Hispanic/Latino | 58449 |
+| Bachelor's or higher | 169888 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/il/districts/17.md

@@ -0,0 +1,59 @@
+---
+type: Jurisdiction
+title: "IL-17"
+classification: congressional-district
+state: "IL"
+district: "IL-17"
+demographics:
+  population: 743507
+  population_under_18: 183366
+  population_18_64: 248249
+  population_65_plus: 311892
+  median_household_income: 60530
+  poverty_rate: 17.13
+  homeownership_rate: 64.85
+  unemployment_rate: 5.24
+  median_home_value: 143300
+  gini_index: 0.4509
+  vacancy_rate: 7.58
+  race_white: 511057
+  race_black: 96350
+  race_asian: 19379
+  hispanic: 98435
+  bachelors_plus: 132466
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, il]
+timestamp: "2026-07-03"
+---
+
+# IL-17
+
+Congressional district IL-17.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 743507 |
+| Under 18 | 183366 |
+| 18–64 | 248249 |
+| 65+ | 311892 |
+| Median household income | 60530 |
+| Poverty rate | 17.13 |
+| Homeownership rate | 64.85 |
+| Unemployment rate | 5.24 |
+| Median home value | 143300 |
+| Gini index | 0.4509 |
+| Vacancy rate | 7.58 |
+| White | 511057 |
+| Black | 96350 |
+| Asian | 19379 |
+| Hispanic/Latino | 98435 |
+| Bachelor's or higher | 132466 |
+
+## Source
+
+- demographics: Census ACS 2023