The legislature is an institution which represents the common and collective interests of the citizens through the enactment of laws and the exercise of oversight functions on the activities of the executive arm of government. For stable and sustainable international peace, nation-building and good governance require building effective societal, economic and political structures that meet the needs of the people. In the quest for nation-building in a democratic state like Nigeria, the exercise of effective legislative oversight function is crucial. It acts to provide checks and balances in cases when the executive branch operates unconstitutionally. It also aims to ensure that all relevant societal groups are included in and benefit from the nation-building and development exercise and that government policies and budgets are implemented in an effective, efficient, transparent and accountable manner. The power of oversight is constitutionally provided to the Nigerian legislature to enable the National Assembly to curtail corruption, inefficiency, or embezzlement in the executive or administration of laws within its legislative right and in the disbursement and administration of funds appropriated by the Acts. Unfortunately, the Nigerian legislature’s capacity to carry out its oversight functions remains ineffective because the legislature and culture are in their infancy and often confronted by many challenges. The focus of this paper is to examine the roles of the national assembly in promoting good governance and nation-building. This paper further recommends that the citizens elect upstanding individuals with no histories of corruption and greed.
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