Maryland:
Harford County, Baltimore County, Baltimore City, Cecil County, Carroll County, Kent County, Queen Annes County, Anne Arundel County, Howard County, Prince Georges County, Montgomery County, Charles County.
Pennsylvania:
Lancaster County, York County, Chester County, Delaware County, Adams County, Franklin County, Cumberland County, Dauphin County, Lebanon County, Berks County, Montgomery County, Philadelphia County, Bucks County
Virginia:
Fairfax County, Arlington County, Loudon County
Washington D.C.