Despite 1992 constitutional changes that permitted the creation of four political parties, President Hassan Gouled Aptidon and the People's Rally for Progress (RPP), in power since independence in 1977, continued to rule the country. 's two main ethnic groups are the politically predominant Issa (the tribe of the President, which is of Somali origin) and the Afar (who are also numerous in Ethiopia and Eritrea). The Afar comprise the largest single tribe in but are outnumbered by the Issa and other Somali clans (Issak and Gadabursi) ....