Akashic EdgeAKASHIC EDGE
ElectionsCandidates
HistorianCartographer2026 ForecastArticlesAPIPricing

Latest Articles

    View all articles →

    Browse by Category

      Data Tools

      • Elections
      • Candidates
      • The Historian
      • The Cartographer
      • American Nations
      • States & Counties
      • Congressional Districts

      About

      Akashic HQ provides deep political data analysis covering 165 years of U.S. elections.

      • Data Sources & Methodology
      • Pricing
      • API Documentation
      • Contact

      © 2026 Akashic HQ. All rights reserved.

      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/2020/US House/California/CA-42
      2020·US House·California·District profile →

      California District 42 US House

      Winner
      REP
      Ken Calvert
      57.1%210,274 votes
      Runner-up
      DEM
      William \ O'Mara
      42.9%157,773 votes
      Margin
      R+14.3
      368,047 total votes
      2 candidates368,047 total votes
      CandidatePartyVotes ▼%Vote Share
      Ken CalvertREP✓
      		REP210,27457.1%
      William \ O'MaraDEM
      		DEM157,77342.9%

      Presidential Vote by District

      5 elections · 2008–2024 · 118th Congress boundaries
      Latest (2024)D+32.4
      Shift vs 2020↓ R+13.4
      R+30EvenD+3020082012201620202024
      YearDem %Rep %MarginTurnout
      202464.5%32.0%D+32.4248,059
      202071.7%25.9%D+45.8289,669
      201672.3%21.6%D+50.7234,937
      201272.3%27.7%D+44.7208,323
      200869.4%30.2%D+39.2201,715

      Seat History

      US House in California

      2024
      Robert M GarciaDEM
      D+36.3
      2022
      Robert M GarciaDEM
      D+36.7
      Redistricted
      2018
      Ken CalvertREP
      R+13.0
      2016
      Ken CalvertREP
      R+17.6
      2014
      Ken CalvertREP
      R+31.5
      2012
      Ken CalvertREP
      R+21.2
      Redistricted
      2010
      Gary G MillerREP
      R+30.4
      2008
      Gary G MillerREP
      R+20.3
      2006
      Gary G MillerREP
      R+100.0
      2004
      Gary G MillerREP
      R+36.3
      2002
      Gary G MillerREP
      R+38.8
      Redistricted
      2000
      Joe BacaDEM
      D+24.6
      1998
      George E Brown Jr.DEM
      D+15.0
      1996
      George E Brown Jr.DEM
      D+1.0
      View all US House history for California →

      Candidates

      Ken CalvertREP
      Record17W-0L
      Avg Margin---
      Career1992-2024
      US House
      Full profile →
      William \ O'MaraDEM
      Record0W-1L
      Avg Margin---
      Career2020-2020
      US House
      Full profile →

      Also in California, 2020

      President1 contest →
      ← All 2020 US House races2020 overviewCalifornia profileAll elections