By Ejeviome Eloho Otobo and Oseloka H. ObazeJuly 9, 2019Is Nigeria Still a Regional Hegemon? Editors' Pick Opinions July 9, 2019By Ejeviome Eloho Otobo and Oseloka H. Obaze On the eve of the 12th Extraordinary Summit of the African Union Heads of State that took place on the…