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Edward C. Dukehart
- 1954 – Maryland’s 7th congressional district (R) – lost
Dukes
- 1934 – Missouri’s 11th congressional district (Comm.) – lost
Elizabeth Ann Dulaney
- 1998 – Missouri’s 5th congressional district (Ref.) – lost
P. P. Dulin
- 1932 – North Carolina’s 9th congressional district (R) – lost
C. W. Duling
- 1934 – West Virginia’s 5th congressional district (Proh.) – lost
Thaddeus Joseph Dulski
- 1958 – New York’s 41st congressional district (D, Liberal) – won
- 1960 – New York’s 41st congressional district (D) – won
- 1962 – New York’s 41st congressional district (D, Liberal) – won
- 1964 – New York’s 41st congressional district (D, Liberal) – won
- 1966 – New York’s 41st congressional district (D, Liberal) – won
- 1968 – New York’s 41st congressional district (D, Liberal) – won
- 1970 – New York’s 41st congressional district (D, Liberal) – won
- 1972 – New York’s 37th congressional district (D, Liberal) – won
Dudley B. Dumaine
- 1964 – Massachusetts’ 4th congressional district (R) – lost
Charles Dumas
- 2012 – Pennsylvania’s 5th congressional district (D) – lost
Raymond A. Dumas
- 2000 – Louisiana’s 5th congressional district (Other) – lost
Zachary Dumont
- 2020 – New Hampshire’s 1st congressional district (L) – lost
Mark J. Dunau
- 2000 – United States Senate (New York) (G) – lost
- 2002 – New York’s 24th congressional district (G) – lost
David H. Dunaway
- 2000 – Tennessee’s 4th congressional district (D) – lost
Osmer E. Dunaway
- 1968 – California’s 2nd congressional district (R) – lost
David C. Dunbar
- 1922 – Utah’s 2nd congressional district (D) – lost
Forrest Dunbar
- 2014 – Alaska’s at large congressional district (D) – lost
James Whitson Dunbar
- 1920 – Indiana’s 3rd congressional district (R) – won
- 1928 – Indiana’s 3rd congressional district (R) – won
- 1930 – Indiana’s 3rd congressional district (R) – lost
W. H. Dunblazier
- 1920 – Arkansas’ 4th congressional district (R) – lost
Alfred Duncan, Jr.
- 1984 – Pennsylvania’s 14th congressional district (SW) – lost
B. Stiles Duncan
- 1934 – Pennsylvania’s 18th congressional district (D) – lost
Chris Duncan
- 2018 – Texas’ 8th congressional district (L) – lost
- 2020 – Texas’ 8th congressional district (L) – lost
Christopher L. Duncan
- 2014 – Florida’s 8th congressional district (W/I) – lost
Eugene J. Duncan
- 1982 – Pennsylvania’s 9th congressional district (D) – lost
George H. Duncan
- 1926 – New Hampshire’s 2nd congressional district (D) – lost
James A. Duncan
- 1920 – Washington’s 1st congressional district (FL) – lost
- 1922 – United States Senate (Washington) (FL) – lost
Jeffrey Darren Duncan
- 2010 – South Carolina’s 3rd congressional district (R) – won
- 2012 – South Carolina’s 3rd congressional district (R) – won
- 2014 – South Carolina’s 3rd congressional district (R) – won
- 2016 – South Carolina’s 3rd congressional district (R) – won
- 2018 – South Carolina’s 3rd congressional district (R) – won
- 2020 – South Carolina’s 3rd congressional district (R) – won
- 2022 – South Carolina’s 3rd congressional district (R) – won
Jim Duncan
- 1998 – Alaska’s at large congressional district (D) – lost
John Duncan (Indiana)
- 2010 – Indiana’s 4th congressional district (L) – lost
John James Duncan, Jr.
- 1988 – Tennessee’s 2nd congressional district (R) – won
- 1990 – Tennessee’s 2nd congressional district (R) – won
- 1992 – Tennessee’s 2nd congressional district (R) – won
- 1994 – Tennessee’s 2nd congressional district (R) – won
- 1996 – Tennessee’s 2nd congressional district (R) – won
- 1998 – Tennessee’s 2nd congressional district (R) – won
- 2000 – Tennessee’s 2nd congressional district (R) – won
- 2002 – Tennessee’s 2nd congressional district (R) – won
- 2004 – Tennessee’s 2nd congressional district (R) – won
- 2006 – Tennessee’s 2nd congressional district (R) – won
- 2008 – Tennessee’s 2nd congressional district (R) – won
- 2010 – Tennessee’s 2nd congressional district (R) – won
- 2012 – Tennessee’s 2nd congressional district (R) – won
- 2014 – Tennessee’s 2nd congressional district (R) – won
- 2016 – Tennessee’s 2nd congressional district (R) – won
John James Duncan, Sr.
- 1964 – Tennessee’s 2nd congressional district (R) – won
- 1966 – Tennessee’s 2nd congressional district (R) – won
- 1968 – Tennessee’s 2nd congressional district (R) – won
- 1970 – Tennessee’s 2nd congressional district (R) – won
- 1972 – Tennessee’s 2nd congressional district (R) – won
- 1974 – Tennessee’s 2nd congressional district (R) – won
- 1976 – Tennessee’s 2nd congressional district (R) – won
- 1978 – Tennessee’s 2nd congressional district (R) – won
- 1980 – Tennessee’s 2nd congressional district (R) – won
- 1982 – Tennessee’s 2nd congressional district (R) – won
- 1984 – Tennessee’s 2nd congressional district (R) – won
- 1986 – Tennessee’s 2nd congressional district (R) – won
Kenneth Duncan
- 2012 – Texas’ 2nd congressional district (L) – lost
Richard M. Duncan
- 1928 – Missouri’s 4th congressional district (D) – lost
- 1932 – Missouri’s at large congressional district (D) – won
- 1934 – Missouri’s 3rd congressional district (D) – won
- 1936 – Missouri’s 3rd congressional district (D) – won
- 1938 – Missouri’s 3rd congressional district (D) – won
- 1940 – Missouri’s 3rd congressional district (D) – won
- 1942 – Missouri’s 3rd congressional district (D) – lost
Richard Meloan Duncan
- 1998 – Arizona’s 2nd congressional district (L) – lost
- 2000 – Arizona’s 6th congressional district (L) – lost
- 2006 – United States Senate (Ohio) (W/I) – lost
Robert Blackford Duncan
- 1962 – Oregon’s 4th congressional district (D) – won
- 1964 – Oregon’s 4th congressional district (D) – won
- 1966 – United States Senate (Oregon) (D) – lost
- 1974 – Oregon’s 3rd congressional district (D) – won
- 1976 – Oregon’s 3rd congressional district (D) – won
- 1978 – Oregon’s 3rd congressional district (D) – won
Robert G. Duncan
- 1922 – Oregon’s 3rd congressional district (I) – lost
Tonya Duncan
- 2014 – Michigan’s 3rd congressional district (G) – lost
Vince Duncan
- 2014 – Texas’ 18th congressional district (I) – lost
- 2018 – Texas’ 18th congressional district (I) – lost
- 2020 – Texas’ 18th congressional district (I) – lost
- 2022 – Texas’ 18th congressional district (I) – lost
Vernon R. Dunckel
- 1944 – Michigan’s 8th congressional district (Proh.) – lost
- 1956 – Michigan’s 2nd congressional district (Proh.) – lost
- 1960 – Michigan’s 2nd congressional district (Proh.) – lost
Mark Dunec
- 2014 – New Jersey’s 11th congressional district (D) – lost
Harry S. Dungan
- 1920 – Nebraska’s 5th congressional district (D) – lost
Vernon Dunkel
- 1952 – Indiana’s 11th congressional district (Proh.) – lost
Philip Dunkelbarger
- 2010 – Massachusetts’ 9th congressional district (I) – lost
John C. Dunkle
- 1920 – Pennsylvania’s 17th congressional district (D) – lost
John J. Dunkle
- 1982 – New York’s 4th congressional district (RTL) – lost
- 1984 – New York’s 4th congressional district (RTL) – lost
- 1990 – New York’s 4th congressional district (RTL) – lost
Bill Dunlap
- 1983 – California’s 5th congressional district (Special) (R) – lost
Harry B. Dunlap
- 1936 – Iowa’s 6th congressional district (D) – lost
Renick W. Dunlap
- 1934 – Ohio’s 11th congressional district (R) – lost
Ron Dunlap
- 1980 – Washington’s 7th congressional district (R) – lost
Tom Dunlap
- 1976 – Oklahoma’s 5th congressional district (D) – lost
Wayne Dunlap
- 2008 – California’s 50th congressional district (L) – lost
D. F. Dunlavy
- 1932 – Ohio’s 19th congressional district (D) – lost
