Inquiry congress is working through the weekend. A top official is testifying under subpoena before house impeachment investigators in a rare saturday sergs. T session. He was involved with directly interacting with President Trump and Rudy Giuliani on ukraine matters. Live from capitol hill, our reporter. First up, who is phillip reeker and why is his testimony so important right now . Phillip reeker is the latest to be brought in before congressional investigators to continue to paint the timeline. Who is he specifically . He was the person who oversaw ukraine policy for the United States, and we know that way back in march he started to raise reservations up the chain at the state department about the Smear Campaign that was happening that we now know is run by Rudy Giuliani and spread in conservative media about then ambassador Marie Yovanovitch. We keep hearing about Marie Yovanovitch over and over again throughout this inquiry, this impeachment inquiry. We know that a couple mont