Year[4] Party Affiliation Winner Number of Votes Party Affiliation Loser Number of Votes Percentage of Votes
1920 Republican William F. Kopp 38,100 Democrat E.W. McManus 20,977 64% - 36%
1922 Republican William F. Kopp 26,651 Democrat John M. Lindley 14,056 65% - 34%
1924 Republican William F. Kopp 42,711 Democrat James M. Bell 17,110 71% - 29%
1926 Republican William F. Kopp 27,358 Democrat James M. Bell 11,408 71% - 29%
1928 Republican William F. Kopp 45,806 N/A No Opponent N/A 100% - 0%
1930 Republican William F. Kopp 27,053 Democrat Max A. Conrad 15,538 63% - 36%
1932 Democrat Edward C. Eicher 55,378 Republican William F. Kopp 46,738 54% - 46%
1934 Democrat Edward C. Eicher 48,544 Republican E. R. Hicklin 39,047 55% - 44%
1936 Democrat Edward C. Eicher 55,721 Republican John N. Calhoun 53,474 51% - 49%
1938 Republican Thomas E. Martin 46,636 Democrat James P. Gaffney 33,765 58% - 42%
1940 Republican Thomas E. Martin 70,120 Democrat Mrs. Zoe S. Nabers 46,040 60% - 40%
1942 Republican Thomas E. Martin 55,139 Democrat Vern W. Nall 32,893 61% - 37%
1944 Republican Thomas E. Martin 72,729 Democrat Clair A. Williams 60,048 55% - 45%
1946 Republican Thomas E. Martin 52,488 Democrat Clair A. Williams 32,849 62% - 38%
1948 Republican Thomas E. Martin 70,959 Democrat James D. France 60,860 53% - 46%
1950 Republican Thomas E. Martin 70,058 Democrat James D. France 43,140 62% - 38%
1952 Republican Thomas E. Martin 105,526 Democrat Clair A. Williams 62,011 63% - 37%
1954 Republican Fred Schwengel 67,128 Democrat John O'Connor 50,577 57% - 43%
1956 Republican Fred Schwengel 94,223 Democrat Ronald O. Bramhall 68,287 58% - 42%
1958 Republican Fred Schwengel 59,577 Democrat Thomas J. Dailey 51,996 53% - 47%
1960 Republican Fred Schwengel 104,737 Democrat Walter J. Guenther 67,287 61% - 39%
1962 Republican Fred Schwengel 65,975 Democrat Harold Stephens 42,000 61% - 39%
1964 Democrat John R. Schmidhauser 84,042 Republican Fred Schwengel 80,697 51% - 49%
1966 Republican Fred Schwengel 64,795 Democrat John R. Schmidhauser 60,534 51% - 48%
1968 Republican Fred Schwengel 91,419 Democrat John R. Schmidhauser 81,049 53% - 47%
1970 Republican Fred Schwengel 60,270 Democrat Edward Mezvinsky 59,505 50% - 49%
1972 Democrat Edward Mezvinsky 107,099 Republican Fred Schwengel 91,609 53% - 46%
1974 Democrat Edward Mezvinsky 75,687 Republican James A. Leach 63,540 54% - 46%
1976 Republican James A. Leach 109,694 Democrat Edward Mezvinsky 101,024 52% - 48%
1978 Republican James A. Leach 79,940 Democrat Richard E. Meyers 45,037 63% - 36%
1980 Republican James A. Leach 133,349 Democrat Jim Larew 72,602 64% - 35%
1982 Republican James A. Leach 89,595 Democrat Bill Gluba 61,734 59% - 41%
1984 Republican James A. Leach 131,182 Democrat Kevin Ready 65,293 68% - 33%
1986 Republican James A. Leach 86,834 Democrat John R. Whitaker 43,985 66% - 34%
1988 Republican James A. Leach 112,746 Democrat Bill Gluba 71,280 61% - 38%
1990 Republican James A. Leach 90,042 Scattering Scattering 151 99% - 1%
1992 Republican James A. Leach 178,042 Democrat Jan J. Zonneveld 81,600 68% - 31%
1994 Republican James A. Leach 110,448 Democrat Glen Winekauf 69,461 60% - 38%
1996 Republican James A. Leach 129,242 Democrat Bob Rush 111,595 53% - 46%
1998 Republican James A. Leach 106,419 Democrat Bob Rush 79,529 57% - 42%
2000 Republican James A. Leach 164,972 Democrat Bob Simpson 96,283 62% - 36%
2002 Republican Jim Nussle 112,280 Democrat Ann Hutchinson 83,779 57% - 43%
2004 Republican Jim Nussle 159,993 Democrat Bill Gluba 125,490 55% - 44%
2006 Democrat Bruce Braley 113,724 Republican Mike Whalen 89,471 56% - 44%
2008 Democrat Bruce Braley 178,229 Republican David Hartsuch 99,447 64% - 35%
2010 Democrat Bruce Braley 103,931[5] Republican Ben Lange 99,976 49% - 48%