Source for Popular Vote data: Pennsylvania Department of State. Bureau of Commissions, Elections and Legislation. 2012 General Election Tuesday, November 06, 2012 Official Returns United States Senator By County, Pennsylvania Department of State. Bureau of Commissions, Elections and Legislation (http://www.electionreturns.state.pa.us/ElectionsInformation.aspx?FunctionID=15&ElectionID=53&OfficeID=2
) (accessed 13 Dec 2012)