Mr Okoro-Emegha noted that the party had not offered an automatic ticket to any individual, as it adhered strictly to its constitution.
Mr Jaji, the House Committee on Ecological Fund chairman, represents Birnin Magaji/Kaura Namoda federal constituency.
Mr Okupe has been criticised for always supporting, advising and praising every government in power since 1999.
Mr Okupe said there is confusion about whether Nigeria is running a federal system or unitary system which any reform must address.
Operatives of the State Security Service have arrested Doyin Okupe, former director-general of the Labour Party presidential campaign council.
