When the Associated Press and other major media outlets called Pennsylvania for Joe Biden in 2020, the Democratic nominee officially became president-elect. Now, four years later, it comes as no surprise that Republican Donald Trump and Democrat Kamala Harris are spending a great deal of time in Pennsylvania — as both campaigns consider it a must-win state. Pennsylvania, the consummate swing state, is very complex politically. Philadelphia is deep blue; the city hasn’t had a Republican mayor since Bernhard Samuel left office on January 7, 1952. Yet rural areas of the Keystone State, often joki…