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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/1972/US Senate/Iowa
      1972·US Senate·Iowa

      Iowa US Senate

      Winner
      DEM
      Richard Clark
      55.1%662,637 votes
      Runner-up
      REP
      John Miller
      44.1%530,525 votes
      Margin
      D+11.0
      1,203,333 total votes
      3 candidates1,203,333 total votes
      CandidatePartyVotes ▼%Vote Share
      Richard ClarkDEM✓
      		DEM662,63755.1%
      John MillerREP
      		REP530,52544.1%
      OtherOTH
      		OTH10,1710.8%

      Seat History

      US Senate in Iowa(Class I)

      2022
      Charles E GrassleyREP
      R+12.2
      2020
      Joni K ErnstREP
      R+6.6
      2016
      Charles E GrassleyREP
      R+24.4
      2014
      Joni K ErnstREP
      R+8.3
      2010
      Charles E GrassleyREP
      R+31.1
      2008
      Tom HarkinDEM
      D+25.4
      2004
      Charles E GrassleyREP
      R+42.3
      2002
      Tom HarkinDEM
      D+10.4
      1998
      Charles E GrassleyREP
      R+37.9
      1996
      Tom HarkinDEM
      D+5.1
      1992
      Charles E GrassleyREP
      R+42.4
      1990
      Tom HarkinDEM
      D+9.1
      1986
      Charles E GrassleyREP
      R+32.5
      1984
      Tom HarkinDEM
      D+11.8
      1980
      Charles E GrassleyREP
      R+8.0
      View all US Senate history for Iowa →

      Candidates

      Richard ClarkDEM
      Record13W-7L
      Avg MarginD+29.1
      Career1968-2016
      State Senate / State House / US Senate
      Full profile →
      John MillerREP
      Record9W-6L
      Avg MarginD+8.1
      Career1889-2006
      State House / US House / US Senate / Governor
      Full profile →

      Also in Iowa, 1972

      President1 contest →Governor1 contest →
      ← All 1972 US Senate races1972 overviewIowa profileAll elections