He says the PDP has opened its gate for all who left the party and all who are willing to return and to contest on a level playing ground with those who have remained are welcomed.
PDP had lost a record of five governors and members of state and National Assembly to the APC in 2013.
"Over the years, like any or every human organisation, it has faced its challenges but I want to pay tribute to those who have stayed steadfast through thick and thin to see us through to this point".
"I want to assure you of my support and cooperation at all times, to make sure that these objectives are achieved by you and subsequently by your successors", he said.
"Now that we have learned our lessons, I hope that we will be guided by the lessons we have learned".
He maintained that there was no other party that was truly settled outside APC, adding that even the Peoples' Democratic Party (PDP) was not stable because it was still fighting to get a chairman.
He promised to continue working with Atiku for the rebuilding of the PDP, as they target the presidency seat in 2019.
Abuja Political Correspondent, Alhassan Bala reports that the party Caretaker Chairman, Senator Ahmed Makarfi said the party is expecting more returnees and new comers. "That is what PDP must stand for if it has to survive".
He urged him to continue to contribute in reinventing and remodeling of the party so that it could reclaim Aso Rock in 2019. We are targeting the local governments. What we want are people who can help us win elections and Atiku is one of them.
"The lack of internal democracy, disregard for the party's constitution, irregular schedule of meetings, inability to conduct a convention, the absence of a Board of Trustees and arrogance of the party leadership will bring about the impending doom", he declared.
The deputy national publicity secretary of the All Progressives Congress (APC), Timi Frank, has warned that except the party takes urgent and crucial steps to curb the lawlessness in it, many members would still follow former Vice-President Atiku Abubakar in defecting from the APC.