Dan takarar shugabancin Najeriya, Peter Obi, wanda yakin neman zabensa ya ja hankulan matasa da masu kada kuri'a a biranen kasar da suka koka da gurbatacciyar siyasa, ya lashe mafi yawan kuri'u a cibiyar kasuwanci ta jihar Legas, inda birni mafi girma a Afirka yake.