Redistricting
The 7th District was reformed for the 1932 election and Iowa dropped its 10th and 11th districts. Cassius C. Dowell ran for and won the 6th Congressional District, while Otha D. Wearin took over the 7th Congressional District. The district was eliminated as a result of the 1970 census. All of the district was then put in the 5th congressional district, with the exception of Crawford and Monona counties which was put in the 6th district.
Read more about this topic: Iowa's 7th Congressional District