This weekend Nigeria’s main opposition party selects its candidate to challenge President Muhammadu Buhari in the elections in February 2019. Nigerian opposition to pick presidential candidate as northwest… https://t.co/AOXIixJPd4 — Reuters Africa (@ReutersAfrica) October 5, 2018 Recent defection of 13 candidates  from Buhari’s ruling All Progressives Congress (APC) to the People’s Democratic Party (PDP)  added tension to…