Barack Obama served for at least two years in office.
Barack Hussein Obama II -LRB- -LSB- brk_husen_obm -RSB- ; born August 4 , 1961 -RRB- is an American politician who served as the 44th President of the United States from 2009 to 2017 .	44th	List of Presidents of the United States	2009	2009 Nobel Peace Prize	President of the United States	President of the United States
