Nyorai kupfuurira kweiyi ndima - Philadelphia yakanga iri nhare yeRepublican Party kubva kuAmerican Civil War kusvikira pakati pema1930. Guta racho rakaita musangano wokutanga weRepublican National Convention muna 1856
. Kunyoresa kweDemocratic kwakawedzera mushure meGreat Depression; zvisinei, guta harina kutakurwa neDemocrat Franklin D. Roosevelt mukukunda kwake kukuru kwa1932 sezvo Pennsylvania yaive imwe yenyika nhanhatu chete dzakakundwa neRepublican Herbert Hoover. Kuvhota kwakawedzera kubva pa600 000 muna 1932 kusvika kunenge 900 000 muna 1936 uye Roosevelt akakunda Philadelphia neinopfuura 60% yemavhoti. Guta racho rakavhotera Democratic musarudzo dzose dzomutungamiri wenyika kubvira muna 1936. Muna 2008, Democrat Barack Obama akawana 83% yemavhoti eguta racho. Kukunda kwaObama kwakanga kuri kukuru zvikuru muna 2012, achitora 85% yemavhoti. Muna 2016, Democrat Hillary Clinton akawana 82% yemavhoti.