The Latest: Top presidential challenger votes in Nigeria

DAURA, Nigeria (AP) — The Latest on Nigeria’s election (all times local):
10:15 a.m.
Nigeria’s top opposition challenger Atiku Abubakar has cast his ballot in a presidential election that observers say is too close to call.
He tells reporters that “I look forward to a successful transition” and says he is impressed with voter turnout. The billionaire former vice president and frequent contender voted in his hometown of Yola in the northeast.
He previously pledged to