Casey at the Bat.

Sen. Obama picks up a Pennsylania superdelegate in Senator Bob Casey, who had previously pledged to stay neutral. "Obama strategists hope that Casey can help their candidate make inroads with the white working-class men who are often referred to as "Casey Democrats." This group identifies with the brand of politics Casey and his late father, a former governor, practiced -- liberal on economic issues but supportive of gun rights and opposed to abortion."