biden. that s where two more of rudy giuliani s proclaimed witnesses come in. former ukrainian prosecutors general victor shokin and uri lutsenko. in an interview with the right-wing pro-trump channel aonshokin claims he was fired at biden s behest for investigating burisma even though there was international consensus that shokin was ineffective at fighting corruption. his successor butted heads with marie yovanovitch who was recalled after a smear campaign against her spearheaded by giuliani and in a stunning twist, giuliani is now acknowledging he wanted yovanovitch out. yovanovitch needed to be removed for many reasons, most critical, she was denying visas to ukrainians who wanted to come to u.s. any explain dem corruption