Senator Barack Obama's campaign got a rather surprising fillip yesterday with the endorsement of Pennsylvania Senator Bob Casey. Pennsylvania is an odd state in many respects and its Democrats reflect that in many ways. The party has a strong, blue collar centrist/conservative Catholic component and the younger Casey owes much of his support that. I would have expected him to come in support of Hillary as she is extremely strong in that sector. We shall have to wait and see what impact this has on Obama's support.