Ghana's ruling party said on Tuesday that President Nana Akufo-Addo held a slight lead in his bid for re-election over his main rival John Mahama, according to its preliminary tally based on results from nearly nine out of ten polling stations. The election on Monday was considered a two-horse race between the incumbent Akufo-Addo and his predecessor Mahama, who offered competing plans to end an economic crisis in West Africa's second-largest economy.