Historically, Democratic strength was concentrated in Philadelphia in the southeast, the Pittsburgh and Johnstown areas in the southwest, and Scranton/Wilkes-Barre in the northeast. Republican strength was concentrated in the Philadelphia suburbs, as well as the more rural areas in the central, northeastern, and western portions. The latter counties have long been among the most conservative areas in the nation. Since 1992, however, the Philadelphia suburbs have swung Democratic; the brand of Republicanism there was traditionally a moderate one. The Pittsburgh suburbs, historically a Democratic stronghold, have swung more Republican since the turn of the millennium.