John Sununu is an American politician and former governor of New Hampshire. He served as the state's 75th governor from 1983 to 1989 and is known for his focus on fiscal responsibility and economic development during his tenure. In addition to his governorship, Sununu was a prominent figure in the Republican Party and served as the White House Chief of Staff under President George H.W. Bush. He has also been involved in various political and business activities after leaving office, maintaining a presence in national politics and public policy discussions.