Some former members of the PDP who have defected to the APC include former Vice President of Nigeria, Atiku Abubakar and embattled Senate President, Bukola Saraki.
Dokpesi reminded the party that it needs to provide a viable opposition to the ruling All Progressives Congress (APC).
Dokpesi said he would reunite the grieving factions in the party, and appealed to those who left for the APC to “return home”.
“We want to give strong opposition to this government because there is a lot hunger and poverty in the country and Nigerians are suffering,” he said.
“My ambition is for PDP to win 2019 and I am going to deploy massively for that to happen. For that reason I am going to bring back all those leaders who left and I hereby tender my unreserved apology to them to return.
“There will be level playing field for all candidates under my leadership. I am not an agent of anybody and I am not sponsored by anyone and I feel insulted to hear that someone is sponsoring me. But I have no commitment to anybody.
“I am ready to kneel down for those aggrieved to come back to the party in order for us to be victorious in 2019.”