Mr. Fitzgerald's pursuit now suggests he might be investigating not a narrow case on the leaking of the agent's name, but perhaps a broader conspiracy.... Lawyers familiar with the investigation believe that at least part of the outcome likely hangs on the inner workings of what has been dubbed the White House Iraq Group ... which included Messrs. Rove and Libby, that worked on setting strategy for selling the war in Iraq to the public in the months leading up to the March 2003 invasion.

http://www.truthout.org/docs_2005/101205I.shtml