Original sentence: However, Southwestern Pennsylvania, until recently, was the most Democratic region of the state (except for the city of Philadelphia).In 2008, however, the Republicans won every single county in Southwestern Pennsylvania except for  Allegheny County (which voted Democratic by 15%).John McCain, however, did best in Southwestern Pennsylvania, a part of Appalachia and the central, rural "T".North of Philadelphia, the heavily industrialized, pro-union counties characterized by cities such as Scranton, strongly backed Obama as well
Edited sentence: He also managed to win two traditionally Republican counties in the eastern part of the state, Dauphin (home to the state capital, Harrisburg) and Berks (home to Reading); the last Democrat to carry these counties was Lyndon Johnson in 1964.However, Southwestern Pennsylvania, until recently, was the most Democratic region of the state (except for Philadelphia).In 2008, however, the Republicans won every single county in Southwestern Pennsylvania except for Allegheny County, home to Pittsburgh (which voted Democratic by 15%).John McCain, however, did best in Southwestern Pennsylvania (around Pittsburgh), a part of Appalachia and the central, rural "T".North of Philadelphia, the heavily industrialized, pro-union counties characterized by cities such as Scranton (birthplace of Obama's running mate, Joe Biden), Wilkes-Barre and Allentown strongly backed Obama as well