The collection chiefly documents DeLapp's long-term involvement with the North Carolina Republican Party at the state and local level. While correspondence comprises the bulk of the collection, there are also some legal and financial papers, writings and speeches, printed material, and clippings. Being Chair of the North Carolina Republican Party (1942-1950) and legal counsel to the party (1950-1964), provided DeLapp access to state party leaders, which is reflected by the correspondents that include J. E. Broyhill, Wilmer D. Mizell, William E. Cobb, and Jesse Helms.