Just as it says, this is a minor correction to the campaign map. The counties around Philadelphia, Pennsylvania are mis-named. As it happens, I live just north of Philly (right where the railroad forks on the map ), right between Norristown and Doylestown. That is Montgomery county, not Philadelphia. (Actually, Norristown is the county seat of Montgomery, and Doylestown of Bucks: the area north of Philly is two counties, not one) The area named "Montgomery" west of Philly (with West Chester in it) is actually Chester County. The area named "Chester" is actually half Chester and half Lancaster. Philadelphia County actually encompasses only the city limits of Philly.
-- Mal