Nigeria, Nov. 9 -- For a politician who has spent more than two decades pursuing Nigeria's highest political office, Atiku Abubakar's latest presidential ambition has encountered an obstacle that goes beyond the familiar contest for votes, alliances and political influence.

The former vice president must now contend with a more fundamental question: whether the political platform on which he hopes to challenge President Bola Tinubu can sustain its own existence as a credible electoral vehicle.

The African Democratic Congress (ADC), which attracted prominent opposition politicians seeking a common platform ahead of the 2027 elections, is facing a fresh leadership crisis following a Federal High Court judgement that invalidated the emerge...