Nigeria Ethnic violence for control over the oil-producing Niger Delta region and inadequate infrastructures are some of the issues in the country. Umaru Yar'Adua of the People's Democratic Party (PDP) came into power in the general election of 2007. The international community has been observing Nigerian elections to encourage a free and fair process, and condemned this one as being severely flawed. Yar'Adua died on 5 May 2010. Dr. Goodluck Jonathan was sworn in as Yar'Adua's replacement on 6 May 2010, becoming Nigeria's 14th Head of State, while his vice-president, Namadi Sambo, an architect and former Kaduna State governor, was chosen
Head of state used his power to appoint Adolf Hitler as Chancellor without consulting the Reichstag. "Note: The head of state in a "presidential" system may not actually hold the title of "president" - the name of the system refers to any head of state who actually governs and is not directly dependent on the legislature to remain in office." Some constitutions or fundamental laws provide for a head of state who is not only in theory but in practice chief executive, operating separately from, and independent from, the legislature. This system is known as a "presidential system" and sometimes called the "imperial