Obama Leads in Key Battleground Counties

Politico: Sen. Barack Obama holds leads in four key counties that will go a long way toward determining the eventual winner in four important swing states — Missouri, Ohio, Pennsylvania and Virginia — according to a new Politico/Insider Advantage survey.

Obama is poised to expand on recent Democratic gains in three populous suburban counties — Pennsylvania’s Bucks County, Missouri’s St. Louis County and Virginia’s Prince William County. In a fourth, Ohio’s Franklin County, home to Columbus and its suburbs, the survey also found Obama with the lead.

In Bucks County, a politically competitive but historically Republican suburb that shares a border with Philadelphia, Obama is running ahead of McCain, 47-41 percent. In 2004, Democrat John F. Kerry carried the county by a slim 51percent to 48 percent.

Obama bests McCain 50 percent to 42 percent in Prince William County, a Washington, D.C., suburb that voted for George W. Bush in both 2000 and 2004. Between 1976 and 2004, Prince William County supported Republican presidential candidates by an average margin of 18 points.