Umar, Elems MahmoudItodo, Sylvanus MohammedAbdullahi, Bariratu2023-12-112023-12-112020-01-11Akinsanya, A. A. (2002). The legislature in a presidential democracy in Nigeria during the fourth republic. Calabar Law Journal, 6(7). Akinsanya, A. A. (2017). uINECand the 2015 general elections”, The Nigeria general elections, 2015, Ibadan: John Archer Publishers. Ayoade, J. A. A. & Akinsanya, A. A. (2005). Nigerian government and politics. Ibadan, John Archer (Publishers) Ltd. Federal Government of Nigeria (1999). Constitution of the Federal Republic cj Nigeria 1999(asamended). Abuja: Federal Government Press. Lawan, A. (2019). Speech as president of senate. Abuja, Inauguration of 9th Senate. Mark, D. B. (2015). Valedictory senate as senate president upon the termination of the 7th assembly, Abuja, Senate, Federal Republic of Nigeriahttps://keffi.nsuk.edu.ng/handle/20.500.14448/2374Modern democracies insist on separation of governmental powers, an arrangement that forestalls autocracy and authoritarianism of either Arm. This paper attempts an expository re-examination of the. relations between the Executive and Legislative Arms of Nigerian Government spanning the Administrations of Presidents Goodluck Jonathan and Muhammadu Buhari (2013-2019). The paper x-rays the sources of the feud which characterized the relations and attributes the source to the interplay of personality and constitutionality; and suggests that for mutual co-existence and effective governance, a return to proper constitutionality, and indeed constitutionalism, as enshrined in the Nigerian Constitution, as variously amended, is a sine qua non.enExecutive, Legislative, GovernmentArticle