Kalu representing Abia North senatorial district made the call on Wednesday.
President Muhammadu Buhari has been asked to obey court order and release the leader of Indigenous People of Biafra IPOB, Mazi Nnamdi Kanu.
Chief Whip of the Senate, Senator Orji Uzor Kalu said the federal government should obey the Court of Appeal ruling that discharged and acquitted Kanu of terrorism charges.
Sen. Kalu, representing Abia North senatorial district made the call on Wednesday while featuring on a TV programme monitored by ABN TV.
"If court of competent jurisdiction says you should give him bail, give him bail, because we are a country of law and order", he said.
Sen. Kalu, a former Abia State Governor cited a case where a water project was ordered stop in Aba by Court of Appeal during his tenure as state chief executive, saying the project is still where he left it over fifteen years after he left office.
He urged the government to obey orders of the court irrespective of their misgivings, in the spirit and letters of the rule of law and separation of power.
The lawmaker said building a new Nigeria will start with respecting court decisions, urging that the window of appeal should be utilized instead.
Appeal Court had discharged and acquitted Mazi Nnamdi Kanu of terrorism charges brought against him by the federal government.