Peter Obi, former governor of Anambra, and Pat Utomi, a professor of political economy, are set to contest the presidential ticket of the Labour Party (LP).
The national convention of the party is set to hold on Monday in Asaba, the Delta capital.
A source in the party told TheCable that Obi and Utomi are the two leading presidential candidates of the party.
On Friday, Obi, a presidential aspirant, joined LP hours after announcing the resignation of his membership of the Peoples Democratic Party (PDP).