[1] Cain was elected to the Parliament of Nauru in a by-election in the Boe Constituency held on 21 February 1998.
[4][5] On 1 June 2001, President Harris appointed Cain as minister for works and home affairs.
[6] On 19 June, Harris additionally appointed Cain as minister for foreign affairs.
[7] On 20 June, acting president Aloysius Amwano additionally appointed Cain as minister for health, sports, justice, and natural resources.
[9] On 27 March, as speaker, Cain dissolved the Fourteenth Parliament of the Republic of Nauru.