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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/2018/US House/Colorado/CO-04
      2018·US House·Colorado·District profile →

      Colorado District 4 US House

      Winner
      REP
      Ken Buck
      60.6%224,038 votes
      Runner-up
      DEM
      Karen McCormick
      39.4%145,544 votes
      Margin
      R+21.2
      369,582 total votes
      2 candidates369,582 total votes
      CandidatePartyVotes ▼%Vote Share
      Ken BuckREP✓
      		REP224,03860.6%
      Karen McCormickDEM
      		DEM145,54439.4%

      Presidential Vote by District

      5 elections · 2008–2024 · 118th Congress boundaries
      Latest (2024)R+18.2
      Shift vs 2020↑ D+0.3
      R+20EvenD+2020082012201620202024
      YearDem %Rep %MarginTurnout
      202439.6%57.9%R+18.2461,578
      202039.5%58.0%R+18.6442,183
      201632.1%59.6%R+27.4365,046
      201236.1%63.9%R+27.8320,451
      200838.7%59.4%R+20.7300,826

      Seat History

      US House in Colorado

      2024
      Lauren BoebertREP
      R+11.6
      2022
      Ken BuckREP
      R+24.4
      Redistricted
      2020
      Ken BuckREP
      R+23.5
      2016
      Ken BuckREP
      R+31.9
      2014
      Ken BuckREP
      R+35.5
      2012
      Cory GardnerREP
      R+21.7
      Redistricted
      2010
      Cory GardnerREP
      R+11.1
      2008
      Betsy MarkeyDEM
      D+12.4
      2006
      Marilyn N MusgraveREP
      R+2.5
      2004
      Marilyn N MusgraveREP
      R+6.3
      2002
      Marilyn N MusgraveREP
      R+13.3
      Redistricted
      2000
      Robert W SchafferREP
      R+79.5
      1998
      Robert W SchafferREP
      R+18.7
      1996
      Robert W SchafferREP
      R+18.1
      View all US House history for Colorado →

      Candidates

      Ken BuckREP
      Record5W-1L
      Avg MarginD+1.7
      Career2010-2022
      US House / US Senate
      Full profile →
      Karen McCormickDEM
      Record2W-1L
      Avg MarginD+36.7
      Career2018-2022
      State House / US House
      Full profile →

      Also in Colorado, 2018

      Governor1 contest →
      ← All 2018 US House races2018 overviewColorado profileAll elections