Hanna was active in Bahamian politics since the 1950s. As a member of the
Progressive Liberal Party, Hanna represented the
Ann's Town, Nassau constituency as an
MP in the Bahamas'
House of Assembly from 1960 to 1992. During this time, Hanna assumed a number of important cabinet posts, including
Minister of Education (1967-1968). He was appointed
Deputy Prime Minister from 20 February 1968 to 1984, and
Minister of Finance from 1973 to 1984. In 1984, Hanna resigned his post as deputy prime minister in protest at the retention by Prime Minister
Sir Lynden Pindling of cabinet colleagues who were heavily criticised by a Royal Commission of Enquiry of that same year. The commission was established to investigate claims of high-level corruption allegedly linked to the flourishing drugs trade of the 1980s. His resignation came within a week of the firing from the Cabinet of
Hubert Ingraham and
Perry Christie, who also were said to have taken a strong stand against the presence in the cabinet of ministers tarnished by the commission and who both later served successive terms as prime minister. On 1 February 2006, Hanna was appointed
Governor General of the Bahamas by Queen
Elizabeth II,
Queen of Bahamas, on the advice of Prime Minister
Perry Christie. He retired on 14 April 2010 and was succeeded by Sir
Arthur Foulkes. His daughter,
Glenys, became an MP for Englerston. ==Honours==