I think they should use Biden to cut McCain's experience and so called maverick credentials at the knees, illustrating his full transformation to Bush partisan by saying something like this: "I've known John McCain for thirty some years now, and after the last eight, I can say to you, John McCain, you're no John McCain.." or "I've known John McCain a long time, and it's sad to say, but the John McCain I knew eight years ago would be ashamed and embarrassed of the campaign John McCain is running today."