igor was asked to sit in and list ton a speakerphone with president zalensky's chief of staff.t would be a social call, a casual call, and instead it was this pressure campaign. i asked him, what did he think that rudy giuliani really wanted, and he said he was shocked. let's watch. >> reporter: so what did you hear rudy giuliani saying to president zalensky's top advisor? >> he wanted two things. basically it was all about a smear campaign on them with candidate biden. basically the first request was multiple investigations, so he wanted the situation with the ex-prosecutor daniel shokin investigated, and he was especially interested in getting ukraine to make a public statement and possibly back up this crazy allegation that it was ukraine, not russia, that meddled in 2016. which was obviously ridiculous, but that's what he wanted. >> for right now secretary of state antony blinken is on his way to these meetings and he's coming as a show of support to zalensky. the people of ukraine want more. they want joe biden to have a virtual meeting with zalensky as a show of support,

he talked to a former aide to president zalenski. >> the former aide was in the room, listening to ais he heard this advisor to the president being pressed -- the president being pressed to smear joe biden, who was then a candidate running for president. he was running for the nomination. he was shocked by this. he said that this certainly undermined his feelings and other ukrainians about the u.s. as he was hearing him say over and over again, you have to investigate biden, you have to publicize a smear campaign against biden running for president. this happened three days before what president trump called his perfect phone call with the president of ukraine, a call that was the focus of trump's first impeachment. now it's giuliani being investigated for efforts to remove the u.s. ambassador. have any u.s. investigators now looking into giuliani approached you? have you talked to anyone from the u.s. about it? >> they haven't. my theory goes as follows. basically, they are focusing at the moment on the events that happened in february and march and april of 2019. pretty much, a mon