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1978
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US Senate
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Iowa
1978
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US Senate
·
Iowa
Iowa US Senate
Winner
REP
Roger W. Jepsen
51.1%
421,598 votes
Runner-up
DEM
Richard Clark
47.9%
395,066 votes
Margin
R+3.2
824,654
total votes
3 candidates
824,654 total votes
Export CSV
Candidate
Party
Votes ▼
%
Vote Share
Roger W. Jepsen
REP
✓
REP
421,598
51.1%
Richard Clark
DEM
DEM
395,066
47.9%
Other
OTH
OTH
7,990
1.0%
Seat History
US Senate in Iowa
(Class I)
2022
Charles E Grassley
REP
R+12.2
2020
Joni K Ernst
REP
R+6.6
2016
Charles E Grassley
REP
R+24.4
2014
Joni K Ernst
REP
R+8.3
2010
Charles E Grassley
REP
R+31.1
2008
Tom Harkin
DEM
D+25.4
2004
Charles E Grassley
REP
R+42.3
2002
Tom Harkin
DEM
D+10.4
1998
Charles E Grassley
REP
R+37.9
1996
Tom Harkin
DEM
D+5.1
1992
Charles E Grassley
REP
R+42.4
1990
Tom Harkin
DEM
D+9.1
1986
Charles E Grassley
REP
R+32.5
1984
Tom Harkin
DEM
D+11.8
1980
Charles E Grassley
REP
R+8.0
View all US Senate history for Iowa →
Candidates
Richard Clark
DEM
Record
13W-7L
Avg Margin
D+29.1
Career
1968-2016
State Senate / State House / US Senate
Full profile →
Roger W. Jepsen
REP
Record
1W-1L
Avg Margin
D+4.3
Career
1978-1984
US Senate
Full profile →
Also in Iowa, 1978
US House
6 contests →
Governor
1 contest →
← All 1978 US Senate races
1978 overview
Iowa profile
All elections