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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/2018/US Senate/Arizona
      2018·US Senate·Arizona

      Arizona US Senate

      Winner
      DEM
      Krysten Sinema
      50.0%1,191,100 votes
      Runner-up
      REP
      Martha McSally
      47.6%1,135,200 votes
      Margin
      D+2.3
      2,384,308 total votes
      3 candidates2,384,308 total votes
      CandidatePartyVotes ▼%Vote Share
      Krysten SinemaDEM✓
      		DEM1,191,10050.0%
      Martha McSallyREP
      		REP1,135,20047.6%
      OtherOTH
      		OTH58,0082.4%

      Seat History

      US Senate in Arizona(Class II)

      2024
      Ruben GallegoDEM
      D+2.4
      2022
      Mark KellyDEM
      D+4.9
      2020(S)
      Mark KellyDEM
      D+2.4
      2016
      John McCainREP
      R+13.0
      2012
      Jeff FlakeREP
      R+3.0
      2010
      John McCainREP
      R+24.2
      2006
      Jon L KylREP
      R+9.8
      2004
      John McCainREP
      R+56.1
      2000
      Jon L KylREP
      R+79.3
      1998
      John McCainREP
      R+41.6
      1994
      Jon L KylREP
      R+14.2
      1992
      John McCainREP
      R+24.2
      1988
      Dennis DeconciniDEM
      D+15.7
      1986
      John McCainREP
      R+21.0
      View all US Senate history for Arizona →

      Candidates

      Krysten SinemaDEM
      Record1W-0L
      Avg MarginD+2.3
      Career2018-2018
      US Senate
      Full profile →
      Martha McSallyREP
      Record2W-3L
      Avg MarginD+2.3
      Career2012-2020
      US Senate / US House
      Full profile →

      Also in Arizona, 2018

      US House9 contests →Governor1 contest →
      ← All 2018 US Senate races2018 overviewArizona profileAll elections