Andy Card will go down in History for heroic service. He is the second longest serving COS in history. Only one other COS served longer in the Eisenhower Administration. Bush said he ask to step down three months ago but stayed on at his request until a new COS was decided.
Who is Josh Bolten?
Very descriptive article from Stanford Law's alumni magazine:
http://www.law.stanford.edu/publications/lawyer/issues/69/sl69-bolten.pdf