Every high school class has one or two guys like Scott McClellan in it.
Everybody knew who they were then. Most people recognized McClellan as one when he first took the job. One wonders why George W. Bush didn't recognize him for what he was before it was too late.
Once a weasel, always a weasel.
Actually Politico had another pretty good take on McClellan from a Republican strategist -- distilled to essence, it said "McClellan shouldn't be the judge because he was part of the problem, too."