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/mn/districts/01.md

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+---
+type: Jurisdiction
+title: "MN-01"
+classification: congressional-district
+state: "MN"
+district: "MN-01"
+demographics:
+  population: 718116
+  population_under_18: 179873
+  population_18_64: 230974
+  population_65_plus: 307269
+  median_household_income: 78573
+  poverty_rate: 9.36
+  homeownership_rate: 74.25
+  unemployment_rate: 2.97
+  median_home_value: 273500
+  gini_index: 0.4437
+  vacancy_rate: 7.13
+  race_white: 594877
+  race_black: 25785
+  race_asian: 21757
+  hispanic: 56593
+  bachelors_plus: 161273
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, mn]
+timestamp: "2026-07-03"
+---
+
+# MN-01
+
+Congressional district MN-01.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 718116 |
+| Under 18 | 179873 |
+| 18–64 | 230974 |
+| 65+ | 307269 |
+| Median household income | 78573 |
+| Poverty rate | 9.36 |
+| Homeownership rate | 74.25 |
+| Unemployment rate | 2.97 |
+| Median home value | 273500 |
+| Gini index | 0.4437 |
+| Vacancy rate | 7.13 |
+| White | 594877 |
+| Black | 25785 |
+| Asian | 21757 |
+| Hispanic/Latino | 56593 |
+| Bachelor's or higher | 161273 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/mn/districts/02.md

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+---
+type: Jurisdiction
+title: "MN-02"
+classification: congressional-district
+state: "MN"
+district: "MN-02"
+demographics:
+  population: 746020
+  population_under_18: 196079
+  population_18_64: 245634
+  population_65_plus: 304307
+  median_household_income: 108162
+  poverty_rate: 6.59
+  homeownership_rate: 77.27
+  unemployment_rate: 3.39
+  median_home_value: 397500
+  gini_index: 0.412
+  vacancy_rate: 3.81
+  race_white: 548179
+  race_black: 64135
+  race_asian: 47050
+  hispanic: 63948
+  bachelors_plus: 219870
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, mn]
+timestamp: "2026-07-03"
+---
+
+# MN-02
+
+Congressional district MN-02.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 746020 |
+| Under 18 | 196079 |
+| 18–64 | 245634 |
+| 65+ | 304307 |
+| Median household income | 108162 |
+| Poverty rate | 6.59 |
+| Homeownership rate | 77.27 |
+| Unemployment rate | 3.39 |
+| Median home value | 397500 |
+| Gini index | 0.412 |
+| Vacancy rate | 3.81 |
+| White | 548179 |
+| Black | 64135 |
+| Asian | 47050 |
+| Hispanic/Latino | 63948 |
+| Bachelor's or higher | 219870 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/mn/districts/03.md

@@ -0,0 +1,59 @@
+---
+type: Jurisdiction
+title: "MN-03"
+classification: congressional-district
+state: "MN"
+district: "MN-03"
+demographics:
+  population: 710658
+  population_under_18: 174530
+  population_18_64: 222188
+  population_65_plus: 313940
+  median_household_income: 106557
+  poverty_rate: 5.94
+  homeownership_rate: 71.34
+  unemployment_rate: 3.51
+  median_home_value: 423800
+  gini_index: 0.4678
+  vacancy_rate: 3.72
+  race_white: 496834
+  race_black: 76704
+  race_asian: 63331
+  hispanic: 34877
+  bachelors_plus: 267265
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, mn]
+timestamp: "2026-07-03"
+---
+
+# MN-03
+
+Congressional district MN-03.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 710658 |
+| Under 18 | 174530 |
+| 18–64 | 222188 |
+| 65+ | 313940 |
+| Median household income | 106557 |
+| Poverty rate | 5.94 |
+| Homeownership rate | 71.34 |
+| Unemployment rate | 3.51 |
+| Median home value | 423800 |
+| Gini index | 0.4678 |
+| Vacancy rate | 3.72 |
+| White | 496834 |
+| Black | 76704 |
+| Asian | 63331 |
+| Hispanic/Latino | 34877 |
+| Bachelor's or higher | 267265 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/mn/districts/04.md

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+---
+type: Jurisdiction
+title: "MN-04"
+classification: congressional-district
+state: "MN"
+district: "MN-04"
+demographics:
+  population: 708464
+  population_under_18: 179315
+  population_18_64: 247640
+  population_65_plus: 281509
+  median_household_income: 84731
+  poverty_rate: 11.17
+  homeownership_rate: 62.92
+  unemployment_rate: 4.17
+  median_home_value: 357700
+  gini_index: 0.4599
+  vacancy_rate: 5.51
+  race_white: 445860
+  race_black: 79705
+  race_asian: 94645
+  hispanic: 56348
+  bachelors_plus: 224717
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, mn]
+timestamp: "2026-07-03"
+---
+
+# MN-04
+
+Congressional district MN-04.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 708464 |
+| Under 18 | 179315 |
+| 18–64 | 247640 |
+| 65+ | 281509 |
+| Median household income | 84731 |
+| Poverty rate | 11.17 |
+| Homeownership rate | 62.92 |
+| Unemployment rate | 4.17 |
+| Median home value | 357700 |
+| Gini index | 0.4599 |
+| Vacancy rate | 5.51 |
+| White | 445860 |
+| Black | 79705 |
+| Asian | 94645 |
+| Hispanic/Latino | 56348 |
+| Bachelor's or higher | 224717 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/mn/districts/05.md

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+---
+type: Jurisdiction
+title: "MN-05"
+classification: congressional-district
+state: "MN"
+district: "MN-05"
+demographics:
+  population: 705006
+  population_under_18: 161848
+  population_18_64: 296277
+  population_65_plus: 246881
+  median_household_income: 80274
+  poverty_rate: 13.27
+  homeownership_rate: 52.98
+  unemployment_rate: 4.94
+  median_home_value: 352800
+  gini_index: 0.4775
+  vacancy_rate: 8.36
+  race_white: 419641
+  race_black: 127105
+  race_asian: 35969
+  hispanic: 82912
+  bachelors_plus: 250317
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, mn]
+timestamp: "2026-07-03"
+---
+
+# MN-05
+
+Congressional district MN-05.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 705006 |
+| Under 18 | 161848 |
+| 18–64 | 296277 |
+| 65+ | 246881 |
+| Median household income | 80274 |
+| Poverty rate | 13.27 |
+| Homeownership rate | 52.98 |
+| Unemployment rate | 4.94 |
+| Median home value | 352800 |
+| Gini index | 0.4775 |
+| Vacancy rate | 8.36 |
+| White | 419641 |
+| Black | 127105 |
+| Asian | 35969 |
+| Hispanic/Latino | 82912 |
+| Bachelor's or higher | 250317 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/mn/districts/06.md

@@ -0,0 +1,59 @@
+---
+type: Jurisdiction
+title: "MN-06"
+classification: congressional-district
+state: "MN"
+district: "MN-06"
+demographics:
+  population: 755084
+  population_under_18: 205224
+  population_18_64: 244090
+  population_65_plus: 305770
+  median_household_income: 105084
+  poverty_rate: 6.6
+  homeownership_rate: 81.15
+  unemployment_rate: 3.36
+  median_home_value: 383200
+  gini_index: 0.4073
+  vacancy_rate: 3.71
+  race_white: 625265
+  race_black: 44059
+  race_asian: 27516
+  hispanic: 31978
+  bachelors_plus: 189224
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, mn]
+timestamp: "2026-07-03"
+---
+
+# MN-06
+
+Congressional district MN-06.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 755084 |
+| Under 18 | 205224 |
+| 18–64 | 244090 |
+| 65+ | 305770 |
+| Median household income | 105084 |
+| Poverty rate | 6.6 |
+| Homeownership rate | 81.15 |
+| Unemployment rate | 3.36 |
+| Median home value | 383200 |
+| Gini index | 0.4073 |
+| Vacancy rate | 3.71 |
+| White | 625265 |
+| Black | 44059 |
+| Asian | 27516 |
+| Hispanic/Latino | 31978 |
+| Bachelor's or higher | 189224 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/mn/districts/07.md

@@ -0,0 +1,59 @@
+---
+type: Jurisdiction
+title: "MN-07"
+classification: congressional-district
+state: "MN"
+district: "MN-07"
+demographics:
+  population: 722392
+  population_under_18: 180494
+  population_18_64: 212533
+  population_65_plus: 329365
+  median_household_income: 74454
+  poverty_rate: 10.88
+  homeownership_rate: 76.16
+  unemployment_rate: 3.03
+  median_home_value: 255000
+  gini_index: 0.4374
+  vacancy_rate: 14.3
+  race_white: 632073
+  race_black: 12239
+  race_asian: 5496
+  hispanic: 45780
+  bachelors_plus: 129300
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, mn]
+timestamp: "2026-07-03"
+---
+
+# MN-07
+
+Congressional district MN-07.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 722392 |
+| Under 18 | 180494 |
+| 18–64 | 212533 |
+| 65+ | 329365 |
+| Median household income | 74454 |
+| Poverty rate | 10.88 |
+| Homeownership rate | 76.16 |
+| Unemployment rate | 3.03 |
+| Median home value | 255000 |
+| Gini index | 0.4374 |
+| Vacancy rate | 14.3 |
+| White | 632073 |
+| Black | 12239 |
+| Asian | 5496 |
+| Hispanic/Latino | 45780 |
+| Bachelor's or higher | 129300 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/mn/districts/08.md

@@ -0,0 +1,59 @@
+---
+type: Jurisdiction
+title: "MN-08"
+classification: congressional-district
+state: "MN"
+district: "MN-08"
+demographics:
+  population: 727411
+  population_under_18: 165945
+  population_18_64: 214106
+  population_65_plus: 347360
+  median_household_income: 74635
+  poverty_rate: 11.26
+  homeownership_rate: 78.06
+  unemployment_rate: 4.4
+  median_home_value: 292400
+  gini_index: 0.4475
+  vacancy_rate: 20.89
+  race_white: 636256
+  race_black: 8791
+  race_asian: 8400
+  hispanic: 15999
+  bachelors_plus: 152226
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, congressional-district, mn]
+timestamp: "2026-07-03"
+---
+
+# MN-08
+
+Congressional district MN-08.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 727411 |
+| Under 18 | 165945 |
+| 18–64 | 214106 |
+| 65+ | 347360 |
+| Median household income | 74635 |
+| Poverty rate | 11.26 |
+| Homeownership rate | 78.06 |
+| Unemployment rate | 4.4 |
+| Median home value | 292400 |
+| Gini index | 0.4475 |
+| Vacancy rate | 20.89 |
+| White | 636256 |
+| Black | 8791 |
+| Asian | 8400 |
+| Hispanic/Latino | 15999 |
+| Bachelor's or higher | 152226 |
+
+## Source
+
+- demographics: Census ACS 2023