John McCain, currently a senator representing Arizona, would be the  oldest president of the United States if elected. Serving in the Senate since 1986, he is known for championing legislation that reformed elections financing and lobbying laws.

McCain, whose father and grandfather served in the U.S. Navy, had a 22-year naval career. He served in Vietnam, where he was a prisoner of war for more than five years, and received many naval honors for his service. McCain was also a presidential candidate in 2000, but lost the nomination to George W.Bush.

McCain was born August 29, 1936, in the Panama Canal Zone, where his father was serving in the U.S. Navy. He attended the U.S. Naval Academy. McCain's wife, Cindy McCain, has been active in many international humanitarian organizations. He has seven children, including a son who recently returned from serving in Iraq and a daughter adopted from Mother Theresa's orphanage in Bangladesh.

Website:http://www.johnmccain.com/