He described the non-elective convention of the party held on Saturday as an affirmation that the PDP was a government in waiting.
Makarfi commended the security agencies for ensuring that the convention was conducted in a secured environment.
He also commended the Independent National Electoral Commission (INEC) for being unbiased and for demonstrating its independency.
Meanwhile, Buhari on Saturday hosted his media team led by information minister Lai Mohammed.
Buhari in London told the team that he has tremendous improvement but awaiting doctors order to return home.