An independent panel backed an African Development Bank probe that found no evidence of wrongdoing by its president, Akinwumi Adesina. The finding enables Adesina, 60, to seek re-election next month as head of the continent’s biggest multilateral lender for another five years. It’s also a rebuff to U.S. Treasury Secretary Steven Mnuchin, whose rejection of the AfDB ethics committee’s original report led to the review. The independent panel, led by former Irish President Mary Robinson, said it...