The 1930 United States Senate elections occurred in the middle of Republican President Herbert Hoover's term. With the Great Depression beginning to take hold,Republican incumbents became unpopular,and Democrats picked up a net of eight seats,erasing the Republican gains from the previous election cycle. Republicans retained control of the U.S. Senate since Vice President Charles Curtis cast the tie-breaking vote. This was the first of four consecutive Senate elections during the Depression in which Democrats made enormous gains,achieving a cumulative pick-up of 34 seats.
1916 United States House of Representatives elections were held,coinciding with the re-election of President Woodrow Wilson.
The 1912 United States House of Representatives elections were held,coinciding with the election of President Woodrow Wilson.
The 1900 United States House of Representatives elections were held,coinciding with the re-election of President William McKinley.
The 1882 United States House of Representatives elections were held during President Chester A. Arthur's term.
The 1876–77 United States House of Representatives elections were held in 1876,coinciding with the election of President Rutherford B. Hayes and the United States Centennial.
The 1868–69 United States House of Representatives elections coincided with the 1868 United States presidential election,which was won by Ulysses S. Grant.
The 1846–47 United States House of Representatives elections were held during President James K. Polk's term at various dates in different states from August 1846 to November 1847.
The 1844–45 United States House of Representatives elections were held at various dates in different states from July 1844 to November 1845.
The 1842–43 United States House of Representatives elections were held during President John Tyler's term at various dates in different states between August 1842 and February 1844.
The 1840–41 United States House of Representatives elections were held at various dates in different states from July 1840 to November 1841.
The 1838–39 United States House of Representatives elections were held during President Martin Van Buren's term at various dates in different states from July 1838 to November 1839.
Patrick Grassley is the Iowa State Representative from the 50th District. A Republican,Grassley has served in the Iowa House of Representatives since 2007. He also serves as speaker of the Iowa House of Representatives. Grassley is the grandson of U.S. Senator Chuck Grassley.
The 1942 United States Senate election in Iowa took place on November 3,1942. Incumbent Democratic Senator Clyde Herring ran for re-election to a second term but was defeated by Republican Governor George A. Wilson.
The 1948 United States Senate election in Iowa took place on November 2,1948. Incumbent Republican Senator George A. Wilson ran for re-election to a second term but was defeated by Democratic former Senator Guy Gillette.
The 1936 United States Senate election in Iowa took place on November 3,1936. Incumbent Republican Senator Lester J. Dickinson ran for re-election to a second term but was defeated by Democratic Governor Clyde Herring.
The 1960 United States Senate election in Iowa took place on November 8,1960. Incumbent Republican Senator Thomas E. Martin did not run for re-election to a second term. Jack Miller won the open seat by defeating Democratic Governor Herschel Loveless.
The 1966 United States Senate election in Iowa took place on November 8,1966. Incumbent Republican Senator Jack Miller was re-elected to a second term in office over Democrat E.B. Smith.
The 1972 United States Senate election in Iowa took place on November 7,1972. Incumbent Republican U.S. Senator Jack Miller ran for re-election to a third term but was defeated by Democrat Dick Clark.
