Source for Popular Vote data: Pennsylvania Department of State Bureau of Commissions, Elections and Legislation. 2012 General Election Tuesday, November 06, 2012 Official Returns President of the United States 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=1
) (accessed 13 Dec 2012)