Nigeria, Nov. 5 -- A day after Atiku Abubakar accused security authorities of plotting to disrupt his presidential campaign launch in Sokoto, he addressed supporters at the event on Wednesday. In Calabar, the convoy of another opposition presidential candidate, Peter Obi, came under attack, with a suspect arrested.

The ADC portrayed the turnout in Sokoto as an endorsement of Atiku's affordability message. In Calabar, police were investigating an attack that Mr Obi blamed on APC supporters, although investigators had not established the attackers' political affiliations.

President Bola Tinubu withdrew an earlier external borrowing request and submitted a $7.7 billion replacement, drawing criticism from Atiku, who was simultaneously renew...