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/2018/US House/California/CA-45
      2018·US House·California·District profile →

      California District 45 US House

      Winner
      DEM
      Katie Porter
      52.0%158,906 votes
      Runner-up
      REP
      Mimi Walters
      48.0%146,383 votes
      Margin
      D+4.1
      305,289 total votes
      2 candidates305,289 total votes
      CandidatePartyVotes ▼%Vote Share
      Katie PorterDEM✓
      		DEM158,90652.0%
      Mimi WaltersREP
      		REP146,38348.0%

      Presidential Vote by District

      5 elections · 2008–2024 · 118th Congress boundaries
      Latest (2024)D+1.5
      Shift vs 2020↓ R+4.6
      R+10EvenD+1020082012201620202024
      YearDem %Rep %MarginTurnout
      202449.3%47.8%D+1.5324,363
      202052.1%46.0%D+6.2357,137
      201653.8%40.6%D+13.3273,405
      201249.9%50.1%R+0.2256,948
      200847.8%52.0%R+4.2267,769

      Seat History

      US House in California

      2024
      Derek TranDEM
      D+0.2
      2022
      Michelle SteelREP
      R+4.8
      Redistricted
      2020
      Katie PorterDEM
      D+6.9
      2016
      Mimi WaltersREP
      R+17.1
      2014
      Mimi WaltersREP
      R+30.2
      2012
      John CampbellREP
      R+16.9
      Redistricted
      2010
      Mary Bono MackREP
      R+9.3
      2008
      Mary Bono MackREP
      R+16.6
      2006
      Mary BonoREP
      R+21.3
      2004
      Mary BonoREP
      R+33.2
      2002
      Mary BonoREP
      R+32.5
      Redistricted
      2000
      Dana RohrabacherREP
      R+29.7
      1998
      Dana RohrabacherREP
      R+21.3
      1996
      Dana RohrabacherREP
      R+27.7
      View all US House history for California →

      Candidates

      Mimi WaltersREP
      Record6W-1L
      Avg MarginR+33.8
      Career2004-2018
      US House / State Senate / State House
      Full profile →
      Katie PorterDEM
      Record3W-0L
      Avg Margin---
      Career2018-2022
      US House
      Full profile →

      Also in California, 2018

      US Senate1 contest →Governor1 contest →
      ← All 2018 US House races2018 overviewCalifornia profileAll elections