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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/1966/US Senate/Idaho
      1966·US Senate·Idaho

      Idaho US Senate

      Winner
      REP
      Len B. Jordan
      55.4%139,819 votes
      Runner-up
      DEM
      Ralph R. Harding
      44.6%112,637 votes
      Margin
      R+10.8
      252,456 total votes
      2 candidates252,456 total votes
      CandidatePartyVotes ▼%Vote Share
      Len B. JordanREP✓
      		REP139,81955.4%
      Ralph R. HardingDEM
      		DEM112,63744.6%

      Seat History

      US Senate in Idaho(Class I)

      2022
      Mike CrapoREP
      R+31.9
      2020
      Jim RischREP
      R+29.4
      2016
      Michael D CrapoREP
      R+38.4
      2014
      Jim RischREP
      R+30.7
      2010
      Michael D CrapoREP
      R+46.3
      2008
      Jim RischREP
      R+23.6
      2004
      Michael D CrapoREP
      R+99.2
      2002
      Larry E CraigREP
      R+32.6
      1998
      Michael D CrapoREP
      R+41.1
      1996
      Larry E CraigREP
      R+17.1
      1992
      Dirk KempthorneREP
      R+13.1
      1990
      Larry E CraigREP
      R+22.6
      1986
      Steven D SymmsREP
      R+3.1
      1984
      James A. McClureREP
      R+46.2
      1980
      Steven D SymmsREP
      R+1.0
      View all US Senate history for Idaho →

      Candidates

      Len B. JordanREP
      Record3W-0L
      Avg MarginR+5.9
      Career1950-1966
      US Senate / Governor
      Full profile →
      Ralph R. HardingDEM
      Record0W-1L
      Avg MarginR+10.8
      Career1966-1966
      US Senate
      Full profile →

      Also in Idaho, 1966

      Governor1 contest →
      ← All 1966 US Senate races1966 overviewIdaho profileAll elections