The coalition poised to challenge Nigeria's president in next year's election has received a major boost after prominent opposition figure Rabiu Musa Kwankwaso announced that he was joining. Kwankwaso, a former governor of Kano state, said on Monday he was now part of the African Democratic Congress (ADC) - a day after resigning from the New Nigeria People's Party (NNPP). A number of opposition heavyweights have joined the emerging ADC coalition in an effort to unseat President Bola Tinubu's