Question: who is the longest serving president in west africa?
Answer: Paul Biya. Cameroon. Prime Minister, then President. ... , Teodoro Obiang Nguema Mbasogo. Equatorial Guinea. President. ... , Ali Khamenei. Iran. President, then. ... , Denis Sassou Nguesso. Republic of the Congo. President. ... , Hun Sen. Cambodia. Prime Minister. ... , Yoweri Museveni. Uganda. President. ... , Idriss Déby. Chad. President. ... , Nursultan Nazarbayev. Kazakhstan.