Campbell Bascom Slemp was an American Republican politician. He was a six-time United States congressman from Virginia's 9th congressional district from 1907 to 1923 and served as the presidential secretary to President Calvin Coolidge. As a philanthropist, Slemp set up the "Slemp Foundation", which provides gifts and scholarships to schools and colleges in Southwestern Virginia.

The Secretary to the President was a 19th- and early 20th-century White House position that carried out all the tasks now spread throughout the modern White House Office. The Secretary would act as a buffer between the president and the public, keeping the president's schedules and appointments, managing his correspondence, managing the staff, communicating to the press as well as being a close aide and advisor to the president in a manner that often required great skill and discretion. In terms of rank it is a precursor to the modern White House Chief of Staff.