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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/1958/US Senate/Montana
      1958·US Senate·Montana

      Montana US Senate

      Winner
      DEM
      Mike Mansfield
      76.2%174,910 votes
      Runner-up
      REP
      Lou W. Welch
      23.8%54,573 votes
      Margin
      D+52.4
      229,483 total votes
      2 candidates229,483 total votes
      CandidatePartyVotes ▼%Vote Share
      Mike MansfieldDEM✓
      		DEM174,91076.2%
      Lou W. WelchREP
      		REP54,57323.8%

      Seat History

      US Senate in Montana(Class II)

      2024
      Tim SheehyREP
      R+7.1
      2020
      Steve DainesREP
      R+10.0
      2018
      Jon TesterDEM
      D+3.5
      2014
      Steve DainesREP
      R+17.7
      2012
      Jon TesterDEM
      D+3.7
      2008
      Max S BaucusDEM
      D+45.8
      2006
      Jon TesterDEM
      D+0.9
      2002
      Max S BaucusDEM
      D+31.0
      2000
      Conrad BurnsREP
      R+3.3
      1996
      Max S BaucusDEM
      D+4.9
      1994
      Conrad BurnsREP
      R+24.7
      1990
      Max S BaucusDEM
      D+38.8
      1988
      Conrad BurnsREP
      R+3.7
      1984
      Max S BaucusDEM
      D+16.2
      1982
      John MelcherDEM
      D+12.8
      View all US Senate history for Montana →

      Candidates

      Lou W. WelchREP
      Record0W-1L
      Avg MarginD+52.4
      Career1958-1958
      US Senate
      Full profile →
      Mike MansfieldDEM
      Record4W-0L
      Avg MarginD+26.2
      Career1952-1970
      US Senate
      Full profile →
      ← All 1958 US Senate races1958 overviewMontana profileAll elections