Mr Kwankwaso made the call in Katsina on Wednesday while addressing loyalists, during a condolence visit to Katsina over the death of Rabe Abubakar.
Mr Kwankwaso served as commissioner for Youth and Sports under Governor Abba Yusuf before resigning his appointment to join the NDC.
The NDC said it is determined to build a sustainable political institution founded on party supremacy.
Mr Obi was handed the party’s flag by former Bayelsa governor Seriake Dickson.
Mr Kwankwaso is tipped to run as the vice-presidential candidate of Mr Obi on the platform of the NDC.
Former Governor Rabiu Kwankwaso says Peter Obi, the former Labour Party presidential candidate, remains a popular politician across Nigeria.
He urged the aspirants to focus on practical solutions rather than making empty promises.
According to him, young Nigerians are searching for the right leadership for the country.
Who is chasing Obi and his new soulmate, former Governor Rabiu Musa Kwankwaso? There are three possible answers.
