Bob Casey, Jr. doesn’t make much sense to me as a potential VP pick for Barack Obama. Conventional wisdom says you need to be pro-choice to be on a national Democratic ticket, and I think that CW is correct. Among other things, I assume that in a general election Obama’s going to want to make the point that John Paul Stevens is even older than McCain, so if he wins then all your reproductive freedoms are belong to Sam Alito. On top of that, Casey doesn’t seem like an especially skilled politician. He has no real virtues relative to Jim Webb, some of Webb’s flaws, plus some additional flaws.
So Webb continues to be tempting, I think Sherrod Brown would make a lot of sense, and I also have a soft spot for the ballsy (metaphorically speaking!) idea of Janet Napolitano.