| Omar Hambagda|| Abubakar Mahdi|
| Omar Hambagda, Mohammed Daggash, Mala Kachalla, Kaka Mallam Yale, Maina Maaji Lawan|Abubakar Mahdi Wikipedia
Abubakar Mahdi was elected Senator for the Borno South constituency of Borno State, Nigeria at the start of the Nigerian Fourth Republic, running on the People's Democratic Party (PDP) platform. He took office on 29 May 1999.
After taking his seat in the Senate he was appointed to committees on Security & Intelligence, Foreign Affairs (Vice-Chairman), Power & Steel,Federal Character and Federal Capital Territory.