AdvertisementGiuliani Says Trump Should '100%' Investigate Biden After Expected Senate Acquittal04:08Download AudioResumeFebruary 04, 2020NPR StafffacebookEmailFormer New York City Mayor and President Trump personal attorney Rudy Giuliani, has emerged as a pivotal figure in the events that ultimately resulted in President Trump's impeachment. Giuliani called the president's expected acquittal "a total vindication." (NPR)