 The National Archives on March 19, 2008, released more than 11,000 pages of Clinton's schedule when she was first lady.Obama's campaign had pushed for release of the documents, arguing that their review was necessary to make a full evaluation of Clinton's experience as first lady.Obama and his wife, Michelle Obama, released their tax returns from 2000 to 2006 on his campaign web site March 26, 2008, and he challenged Clinton to release hers.