Details the political career of Dieleman including his tenure in the Iowa House,1974-1982, and Iowa Senate, 1982-1994. The collection includes: correspondence, newsletters to constituents, memorabilia from his political career, particularly the campaigns and elections, and his office files on various topics that arose during his political career. One issue that took up much of his time and energy was riverboat gambling. In this area he also was appointed to serve as chairman of the committee to write a statement on gambling for the Christian Reformed Church in North America. Compulsory school attendance and abortion also seem to have taken up a significant amount of his legislative time.