Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Matthew Whitaker -  Matthew G. Whitaker (born October 29 1969 Des Moines Iowa) is a former U.S. Attorney for the Southern District of Iowa. He was appointed June 15 2004 by President George W. Bush. Whitaker resigned in November 2009 following the appointment and confirmation of Nicholas A. Klinefledt who was appointed by President Barack Obama.Whitaker graduated with an Master of Business Administration Juris Doctor and Bachelor of Arts from the University of Iowa.
A:
Office Holder