Nigeria

Nigeria is a federal republic modeled on the United States.

An excerpt from the article 19 facts about Nigeria

It is divided into 36 states and one Federal Capital Territory with Abuja as the national capital, which are further divided into 774 local government areas.

Executive power in the state is exercised by the president, who is both head of state and head of the federal government, The president is elected in a general election for a maximum two four-year tenure.