The vice president and flagbearer of the New Patriotic Party (NPP), Dr. Mahamudu Bawumia, has called for a presidential debate between himself and former president and the flagbearer of the National Democratic Congress (NDC) John Mahama, he stated that, ldquo;Let rsquo;s meet Mano-a-mano rdquo; which literally means, let rsquo;s meet man and man.