Romney won 55 of 67 PA counties but not a single electoral college vote because of the number of voters in the Philadelphia area. Conservatives mainly win in areas where the population density is less than 800 people per square mile. A side effect of continuing farm automation is voters needing jobs must move to higher density communal living, and eventually become communists. Unless a plague or rogue polar submarine takes out some big cities it's not looking good for conservatives. One tactic that might help is to empower big cities to raise taxes on a simple majority vote and pass all the anti-business regulation and government hiring they want. They will all quickly turn into bankrupt wastelands like Detroit. This tactic should be called economic nuking because it looks surprisingly like the real thing.
Also count in Steel City, Pittsburgh as well. Otherwise PA would be red if it was not for the two PA ciites.