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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/1986/US House/California/CA-01
      1986·US House·California·District profile →

      California District 1 US House

      Winner
      DEM
      Douglas H Bosco
      67.5%138,174 votes
      Runner-up
      REP
      Floyd G Sampson
      26.6%54,436 votes
      Margin
      D+40.9
      204,759 total votes
      3 candidates204,759 total votes
      CandidatePartyVotes ▼%Vote Share
      Douglas H BoscoDEM✓
      		DEM138,17467.5%
      Floyd G SampsonREP
      		REP54,43626.6%
      Elden McFarlandOTH
      		OTH12,1495.9%

      Presidential Vote by District

      5 elections · 2008–2024 · 118th Congress boundaries
      Latest (2024)R+24.9
      Shift vs 2020↓ R+5.8
      R+20EvenD+2020082012201620202024
      YearDem %Rep %MarginTurnout
      202436.1%61.1%R+24.9326,893
      202039.2%58.3%R+19.1348,189
      201635.6%57.4%R+21.8297,539
      201240.7%59.3%R+18.6274,988
      200842.5%56.7%R+14.2298,354

      Seat History

      US House in California

      2024
      Doug LamalfaREP
      R+30.7
      2022
      Doug LamalfaREP
      R+24.1
      Redistricted
      2020
      Doug LamalfaREP
      R+14.0
      2018
      Doug La MalfaREP
      R+9.8
      2016
      Doug LamalfaREP
      R+18.1
      2014
      Doug LamalfaREP
      R+22.1
      2012
      Doug La MalfaREP
      R+14.8
      Redistricted
      2010
      Mike ThompsonDEM
      D+31.8
      2008
      Mike ThompsonDEM
      D+44.7
      2006
      Mike ThompsonDEM
      D+37.3
      2004
      Mike ThompsonDEM
      D+38.7
      2002
      Mike ThompsonDEM
      D+31.7
      Redistricted
      2000
      Mike ThompsonDEM
      D+37.0
      1998
      Mike ThompsonDEM
      D+29.0
      1996
      Frank D RiggsREP
      R+6.2
      View all US House history for California →

      Candidates

      Douglas H BoscoDEM
      Record6W-1L
      Avg MarginD+26.4
      Career1978-1990
      US House / State House
      Full profile →
      Elden McFarlandOTH
      Record0W-1L
      Avg Margin---
      Career1986-1986
      US House
      Full profile →
      Floyd G SampsonREP
      Record0W-1L
      Avg Margin---
      Career1986-1986
      US House
      Full profile →

      Also in California, 1986

      US Senate1 contest →Governor1 contest →
      ← All 1986 US House races1986 overviewCalifornia profileAll elections