Marc Ambinder and Steve Benen have noted that John McCain embarked on a biography tour not long after Karl Rove made a speech in which he recommended that McCain ... embark on a biography tour.
I don't have much to add to that strong hint that Rove is significantly involved in McCain's campaign except to note that Rove, in his recent GQ interview, mentioned "some things I'm doing in politics under the radar."
It would be nice if it simply weren't possible for a guy like Karl Rove to do anything "under the radar." It would be nice if we had a press that cared to find out what he's up to and cared to inform us -- so we'd know, say, if a McCain victory really is going to mean a third Bush term.
But I guess that's probably too much to ask.