This chapter is focused on the intrigues that characterise the conduct of party primaries and the attendant implications for election administration in Nigeria. Experiences of electoral politics in contemporary Nigeria reveal that controversies surround the issue of internal democracy within political parties, particularly regarding the conduct of primary elections. Since Nigeria returned to multiparty politics in 1999, the issue of internal democracy within political parties has become increasingly problematic, with a rise in intra-party conflicts and litigations arising from the conduct of primary elections. The irregularities experienced in the conduct of primary elections have culminated in a threat to the consolidation of democracy in contemporary Nigeria. This chapter examines the drivers of irregularities and controversies, as well as the nature of disputes that arise during and after primary elections, with a view to understanding their implications for election administration and, by extension, the consolidation of democracy in Nigeria. The methodology employed for this study is qualitative; relevant literature on internal democracy and primary elections, as well as critical archival materials such as the Nigerian Constitution, Party Constitutions, and the Nigerian Electoral Act, were consulted and reviewed. The study is guided by the elite theory in analysing the political behaviour of political elites within the party system, focusing on how they manipulate the conduct of primary elections and nomination processes for personal gain and selfish interests. Conclusively, the study identifies the inability of the Election Management Body to enforce compliance, the relegation of internal democracy and the politics of exclusion played by leaders of political parties as the bane of flawed conduct of primary elections in Nigeria.