LycomingLycomingBradfordBradfordClearfieldClearfieldTiogaTiogaCentreCentreSomersetSomersetPotterPotterWestmorelandWestmorelandCrawfordCrawfordBedfordBedfordMcKeanMcKeanLancasterLancasterYorkYorkLuzerneLuzerneWarrenWarrenClintonClintonHuntingdonHuntingdonBerksBerksWashingtonWashingtonIndianaIndianaSusquehannaSusquehannaElkElkErieErieFayetteFayetteButlerButlerSchuylkillSchuylkillFranklinFranklinChesterChesterWayneWayneAlleghenyAlleghenyCambriaCambriaVenangoVenangoMercerMercerArmstrongArmstrongJeffersonJeffersonBucksBucksMonroeMonroeClarionClarionGreeneGreenePikePikeDauphinDauphinPerryPerryCumberlandCumberlandBlairBlairAdamsAdamsColumbiaColumbiaMontgomeryMontgomeryNorthumberlandNorthumberlandLackawannaLackawannaSullivanSullivanBeaverBeaverFultonFultonForestForestMifflinMifflinWyomingWyomingCameronCameronJuniataJuniataCarbonCarbonNorthamptonNorthamptonLebanonLebanonLawrenceLawrenceLehighLehighSnyderSnyderUnionUnionDelawareDelawarePhiladelphiaPhiladelphiaMontourMontour
+
–
Net shift
+30K R
+15K R
no change
+15K D
+30K D
Net shift is the difference between the changes in Democratic and Republican registrations. For example, a county that added 100 Democrats and 120 Republicans would have a +20 Republican shift; a county that added 100 Democrats and lost 120 Republicans would have a +220 Democratic shift.