Kalu, who is currently the senate chief whip, had been elected under the All Progressives Congress (APC).
But the tribunal nullified his election at its sitting on Monday.
Mao Ohuabunwa, Kalu’s Peoples Democratic Party (PDP) rival in the election, had challenged his victory at the tribunal.
Do you have any information or event for ABUJAPRESS to publish or cover? Kindly Call us on +2349075556668 or send us message on Whatsapp number +2349075556668 or send us an email [email protected]