The Member of Parliament for Manhyia Mathew Opoku Prempeh is accusing the Vice President John Mahama of entering into a deal to collateralize the country's oil revenue even though Parliament is yet to pass that bill.The MP cites a letter he claims to have intercepted as basis for his allegations.Attached is the full details of the letter.Aide to the Vice President John Jinapor has however denied that John Mahama has written such a letter.He is threatening to take the matter up at the Criminal and Investigative Department of the Police.Source:Myjoyonline.com/Ghana