Nnamani was elected into the Senate in 2003, and was Senate President between 2005 and 2007.
Nnamani registered as a member of the APC in Amechi-Uwani, Enugu south local government area of Enugu state, on Sunday.
According to Ben Nwoye, the Chairman of APC, Enugu said:
We have worked tirelessly since 2016 to build our structure, as well as convince these politicians to join us for a better Nigerian.
As it stands, we want the world to know that the PDP is in comatose in Enugu state, and we are fully prepared to wrestle power from them in 2019, because we have the structure.
You will quite agree with me that all those politicians that made PDP tick in Enugu state in the past, including former governor of old Anambra state and ex- senator, Ifeanyichukwu Jim Nwobodo have all dumped the opposition party, for APC.
Nnamani said he joined APC after intense pressure from his constituents.
“All politics is local. I have to do what my constituents demanded by joining the APC at ward level,” he told Premium Times on Sunday.
Nnamani was a founding member of the Peoples Democratic Party (PDP) but left in 2016. He was also named head of the 24-man Electoral Reform Committee set up by President Buhari in October last year.
