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. John C. Andreason -  John C. Andreason (born on April 20 1929) is a Republican member of the Idaho Senate representing the 15th District. District 15 includes Ada County which represents the Greater Boise Area. He has been a member of the Idaho State Senate since 1995 and is currently serving his 10th term. Andreason has held various positions within the Republican Party.
A:
Office Holder