While he said that President Muhammadu Buhari was not part of the plot, he however called on him to urgently investigate the allegation and ensure that the convention was not disrupted by some "overzealous elements in the APC government".
In his response, Shagari praised PDP for its contributions to the building of democratic structures in the country.
The party, he said, would make available the list of accredited delegates to all aspirants at least 48 hours before the convention to diffuse the rumour that the list has been altered to suit selected aspirants. It is a very credible information.
"You have prayed for a successful convention of the PDP". We have no evidence that the president is aware of this. "We now have the opportunity to right the wrongs of the past by allowing the will of the people to prevail at the convention".
On Atiku's defection, Jibrin said, "APC should remain grateful to Atiku Abubakar, the Wazirin Adamawa, for peacefully resigning with respect without tearing their party membership card, unlike our former president, Chief Olusegun Obasanjo, who after ruling Nigeria under the PDP for eight years and after serving as the chairman of the BoT for about Two (2) years, disgracefully tore his membership card".
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The bill now heads to the Senate for a vote, which is subject to a 60-vote hurdle, and therefore needs Democrats to support it. He said they want "illegal immigrants pouring into our country, bringing with them crime, tremendous amounts of crime".
The elder statesman was speaking when he received members of the PDP Convention Planning Committee led by their Chairman and Delta State Governor, Ifeanyi Okowa, at his residence in Minna, the Niger State capital.
Ossai, who is a member of the Screening Sub-Committee for the convention, therefore called of members of the party to vote for candidates who were experienced and ready to work to return the party to power.
The National Publicity Secretary of the APC, Mallam Bolaji Abdullahi, said the claim that the APC was afraid of conducting its convention "is an empty platitude" lacking in substance.
It was not clear whether Atiku had asked for waiver or not even as many analysts said the Wazirin Adamawa would definitely navigate his way ahead of the party's presidential primary next year.
On his part, Chairman of the PDP Caretaker Committee, Senator Ahmed Makarfi, said Anambra and Osun states would make use of statutory delegates for the convention due to the conflicts that have bedevilled the party in both states recently.