Vice President and flagbearer of the New Patriotic Party (NPP), Dr Mahamudu Bawumia, has accused former President John Mahama of avoiding a presidential debate ahead of December's elections, claiming that Mr. Mahama fears having his record exposed. Dr Bawumia, who is set to face Mahama as one of the main candidates in December, has issued an open challenge for a presidential debate. However, the former President has so far declined the invitation. Addressing supporters at Dansoman in Accra on Monday evening [August 26], Dr.