How can Mahama accuse Akufo-Addo of ethnic discrimination? - NPP questions

Nana Addo Dankwa Akufo-Addo, President of Ghana(L) & John Dramani Mahama, ex-president, Ghana(R)
Nana Addo Dankwa Akufo-Addo, President of Ghana(L) & John Dramani Mahama, ex-president, Ghana(R)