Nigeria, June 16 -- Nigeria's two main opposition parties, ADC and NDC, are facing multiple internal crises, calling into question their ability to challenge or even defeat the ruling party, APC, in next year's general elections.

Although Nigeria currently has 21 registered parties, the African Democratic Congress (ADC) and the Nigeria Democratic Congress (NDC) are the two expected to pose formidable challenges to the ruling APC. This is partly because of their presidential candidates: Atiku Abubakar of the ADC and Peter Obi of the NDC.

Mr Abubakar came second in the last presidential election, while Mr Obi came third. Together, they had more votes than the eventual winner, President Bola Tinubu, in 2023. Though both men were in differe...