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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/2010/US Senate/Delaware
      2010·US Senate·Delaware
      Special

      Delaware US Senate

      Winner
      DEM
      Chris Coons
      56.6%174,012 votes
      Runner-up
      REP
      Christine O'Donnell
      40.0%123,053 votes
      Margin
      D+16.6
      307,402 total votes
      3 candidates307,402 total votes
      CandidatePartyVotes ▼%Vote Share
      Chris CoonsDEM✓
      		DEM174,01256.6%
      Christine O'DonnellREP
      		REP123,05340.0%
      OtherOTH
      		OTH10,3373.4%

      Seat History

      US Senate in Delaware(Class II)

      2024
      Lisa Blunt RochesterDEM
      D+17.1
      2020
      Chris CoonsDEM
      D+21.5
      2018
      Thomas R CarperDEM
      D+22.1
      2014
      Chris CoonsDEM
      D+13.6
      2012
      Thomas R CarperDEM
      D+37.5
      2008
      Joe BidenDEM
      D+29.4
      2006
      Thomas R CarperDEM
      D+39.7
      2002
      Joe BidenDEM
      D+17.4
      2000
      Thomas R CarperDEM
      D+11.8
      1996
      Joe BidenDEM
      D+21.9
      1994
      William R. Roth Jr.REP
      R+13.3
      1990
      Joe BidenDEM
      D+26.9
      1988
      William R. Roth Jr.REP
      R+24.1
      1984
      Joe BidenDEM
      D+20.2
      View all US Senate history for Delaware →

      Candidates

      Chris CoonsDEM
      Record3W-0L
      Avg MarginD+17.2
      Career2010-2020
      US Senate
      Full profile →
      Christine O'DonnellREP
      Record0W-2L
      Avg MarginD+23.0
      Career2008-2010
      US Senate
      Full profile →

      Also in Delaware, 2010

      US House1 contest →
      ← All 2010 US Senate races2010 overviewDelaware profileAll elections