Nana Akufo-Addo
Ghana?s main opposition party has filed a petition at the Supreme Court to challenge President John Mahama?s victory in this month?s election.
The National Patriotic Party (NPP) rejected the results of the 7 December poll, alleging fraud.
The election commission said Mr Mahama had secured 50.7% of votes, enough to avoid a run-off against NPP candidate Nana Akufo-Addo who 47.7% of the vote.
International election observers described the poll as free and fair.
The NPP said it had waited to file its challenge in court until it had analysed the data from 26,000 polling stations where close to 11 million votes were cast.
Mr Akufo-Addo lost the 2008 presidential run-off by one percentage point, but accepted the result.
Mr Mahama, from National Democratic Congress party, was Ghana?s vice-president until the unexpected death of President John Atta Mills in July catapulted him into office.
Ghana is regarded as one of Africa?s most stable democracies.
Via BBC
