Filling U.S. Senate Vacancies: Perspectives and Contemporary Developments
http://www.fas.org/sgp/crs/misc/R40421.pdf
Discusses methods by which vacancies in the Senate have been filled since the passage of the 17th Amendment in 1913, the recent surge of vacancies, and legislative proposals that would mandate special elections with federal financial assistance to the state holding such an election. From the Congressional Research Service, posted by the Federation of American Scientists.
