Ruling party candidate Bola Tinubu led the race for Nigeria's presidency on Tuesday, according to partial official tallies issued after a tight election marred by frustration over long delays, technical hitches and charges that results have been manipulated. The main opposition parties have called for the vote's cancellation, describing the election as a "sham".
With President Muhammadu Buhari stepping down, many Nigerians hoped Saturday's vote would open the door to a leader able to tackle insecurity, ease economic malaise and root out poverty in Africa's most populous country.
