mr. wiley, coming as far as you have to help us with proper testimony. our first witness is dr. aiden hirsch. he is an associ professor from tufts university focusing on american politics. he spent 7 years as an assistant professor at yale university. he is a nationally published author. he has a masters degree in political science from harvard university and a bachelor's degree from tufts university. next, besides thinking you we welcome you to this hearing and hopefully you feel comfortable. i know you have testified elsewhere. ristophewylie is a former director of research at cambridge analytica. he worked with president obama's campaign for the canadian liberal party and for the united kingdom's liberal democratic party from 2013 to 2014. he also was studying for a phd. he has an undergraduate degree in law from the london school of economics. lastly, dr. mark jamison is a visiting scholar at americ emprise institute. he is also the director and professor of public utility research center,

and mr. wileydescribed that data obtained via the foundation data of the company, which may have collected data on up to 87 million users. it was also clear that there's been action by facebook following these revelations or allegations. so do you want to -- what you'll perhaps do in your statement do you clarify or amend now the evidence that you gave in february with respect to data supplied by gsr and dr. coven? >> thank you. i'm grateful for that opportunity. i thought you would like to continue with the very short statement on this. and so we'll do that and then we can move on to questions from there. look, clearly i accept that some of my offices could have been clearer. but i assure you that i did not intend to mislead you. it was my firm impression that mr. collins questions were focused on whether we were currently in possession of data from gsr following the research they carried out in which i was very clear in telling the committee about. my belief was and remains that we deleted all su

it was simply convenient for mr. wiley to imply we had disseminated that when actually we had nothing to do with that campaign. we were not involved in that particular set of advertisements or tv commercials or whatever they were. i believe a spokesperson for the campaign has also exonerated us from involvement in that. >> isn't it true cambridge analytica cannot produce a single example of refusing a proposal from a client for the advertisement and therefore cambridge analytica, an unethical company itself and did not apply high standards? >> i think you draw that conclusion from your statement. i think you would like to draw that conclusion because it fits with a certain prejudice which has been prevalent in the media. it has not been borne by evidence. i certainly have not seen any evidence that supports it obviously, a part from this channel 4 entrapment video. i don't agree with what you said because the answer is no, it is not true. >> you produced no evidence of cambridge analytica rejecting an advertisement on ethi

indeed, mr. wiley described that data obtained via the kogan act from facebook is the foundation set of the company, which may have collected data on up to 87 million users, and also clearly there has been action by facebook following these revelations or allegations. do you want to clarify or amend now the evidence that you gave in february with respect to data supplied by gsr and dr. kogan? >> thank you. i'm grateful for that opportunity. look, clearly i accept that some of my answers could have been clearer, be i assure you that i did not intend to mislead you. of course the answer to this question should have been yes. there was certainly no intention to mislead the committee. that was my understanding, and it was a genuine misunderstanding. >> that's the head of the data firm that the trump campaign used in the 2016 elections now admitting what he had previously denied about where they got their data that they used for their political operations, including their most famous victory. and there is a

some allegations come from people who used to work for you, not mr. wiley but others as well. some do not want to be identified and others have. and i think the questions will remain as long as people speak out in that way. i think we have covered the questions we wanted to ask today and thank you for coming back and giving evidence. >>> on capitol hill, they discuss cambridge analytica and look at potential steps to protect consumers. coverage begins at 2:30 on c- span. >>> michael horwitz testifies on hillary clinton's use of personal email. and the fbi investigation leading up to the 2016 election. he will take questions at a hearing with members of the heise -- house oversight committees and that is live at 10 eastern. you can follow them on c-span.org and with the free radio app. >>> this language of attack of harm, of damage that by expressing an opinion, that people don't like, you have inflicted an injury and i found that very striking and frankly, rather frightening if the truth be told, and quite emblematic of the way that the left is responding. to any sort of disse

mr. wiley's advice. he pointed out that discrepancy.acebook's policy is not really its policy for a variety of reasons that i am not qualified to state. various concerns and ways of letting facebook know. the next question i had is what action if any did you take when you learned of the conflict? mr. kogan: there were a couple of things that happened. first, we had a collaboration with facebook. they visited me on december of 2015. during that meeting i talked about it. indication of anything that was worrisome. also, my partner on the project was interviewed. i don't believe there are any objections that were raised then. mr. kogan: did you guys discuss the policies in facebook privacy policy? describe the substance of those conversations. mr. kogan: my app was an academic app. about makingns sure it was on fully commercial terms. i am a datae said lawyer and i will walk you through this process. we headed up the reins to him. reigns tooff the him. >> did you discuss whether the gsr terms of service completed with facebook's privacy po

mr. rosenstein helped provide a cover story by writing about the clinton investigation. joining me now msnbc legal analyst paul butler, maya wileyning us now is the host of msnbc's must see tv, the last word, one lawrence o'donnell. lawrence, i will start with you because among the people who are undercutting donald trump's new defense that he didn't fire comey because of russia are donald trump in the past in his past statements but also rudy giuliani. here is rudy giuliani on sean hannity's show on may 2nd. >> he fired comey because comey would not, among other things, say that he wasn't the target of the investigation. he is entitled to that. hillary clinton got that. and he couldn't get that. so he fired him and he said, i'm free of this guy. >> the investigation being the russia investigation. >> donald trump and rudy giuliani are now in the middle of a contest for who can say the stupidest thing about the firing -- the most harmful thing about the firing of comey on tv, most harmful to donald trump. and, you know, when i sit here in this, by the way, very relaxed pose as a guest, just watching that lester holt interview cl