By Camillus Eboh and Ben Ezeamalu KADUNA, Oct 24 (Reuters) - President Bola Tinubu formally launched his campaign for a second term on Saturday in the northern city of Kaduna, where he sought. President Bola Tinubu will officially launch his 2027 presidential re-election campaign in Kaduna on October 24, according to Senator Abdulaziz Yari, the Director-General of the All.