Key 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.