Nigeria, July 14 -- "Sovereignty belongs to the people of Nigeria from whom government through this Constitution derives all its powers and authority." - Section 14(2), Constitution of the Federal Republic of Nigeria, 1999

In 2007, the contest to rule Nigeria was between two sons of Katsina State. From the Katsina Emirate, Umaru Musa Yar'Adua ran on the ticket of the then ruling Peoples' Democratic Party (PDP) to succeed outgoing president, Olusegun Obasanjo. His elder brother, Shehu, had served as Obasanjo's second-in-command during military rule from February 1976 to October 1979. From the Daura Emirate, also in Katsina State, Muhammadu Buhari who also served alongside Obasanjo and Shehu Musa Yar'Adua in that military government, was t...