Nigeria is a Federal Republic modelled after the United States, with executive power exercised by the president and with overtones of the Westminster System model in the composition and management of the upper and lower houses of the bicameral legislature. The current president of Nigeria is General Muhammadu Buhari, who succeeded Goodluck Jonathan to the office in 2015. The president presides as both Head of State and head of the national executive and is elected by popular vote to a maximum of two four-year terms.
The president's power is checked by a Senate and a House of Representatives, which are combined in a bicameral body called the National Assembly. The Senate is a 109-seat body with three members from each state and one from the capital region of Abuja; members are elected by popular vote to four-year terms. The House contains 360 seats and the number of seats per state is determined by population.