A major factor people back McCain is because of his integrity and political courage. So why not have a veep who had the Feingold in McCain-Fiengold? He had some presidential ambitions, so he might accept. And while we'll miss his role in the senate, Mark Warner is coming to town in '08.
Now, if, as Lessing says, Obama will be, you know...or Hillary, you know..., the bigot would have to atone to a Jewish President. And if they're both gone, we'll have a female catholic.
I think Dems haven't really been thinking through with veep choices. Take you're pick of a western governor. I just think Feingold's one of the best we got and can balance McCain's claim on integrity.