Adesina has been at the centre of allegations of impropriety at the Abidjan-based financial institution which have been a subject of inquiry by the bank’s ethics committee.
The embattled AfDB president has consistently maintained innocence. In statement last month, he described the allegations against as “trumped up”.
The committee cleared the AfDB President but the United States Department of Treasury dismissed the outcome, calling for an independent investigation of the allegations against Adesina.
AfDB, a regional multilateral institution, is owned mostly by African countries but the US is a the second largest shareholder after Nigeria.
Nigerian and other African leaders have been rallying support for Adesina who is completing his five-year-tenure but is in the running for another term.