The ruling party’s candidate says John Dramani Mahama has won “decisively” Ghana’s ruling party candidate, Mahamudu Bawumia, has conceded defeat in the West African nation’s presidential election, declaring his main opponent, former president John Dramani Mahama, to be the winner. In a concession speech on Sunday, Bawumia, the country’s current vice president, congratulated Mahama on his victory after preliminary results showed the New Patriotic Party (NPP) could be on course to suffer one of