originally obtained through a facebook application developed by a russian born professor named aleksandr kogan. professor kogan maintains a teaching position at st. petersburg university in russia, a state-funded institution, and has traveled frequently back and forth to russia. these are concerning questions, not only for the united states, but for all democracies around the world. based on what we have already learned, there is no question that the future of data privacy will have a significant impact on every aspect of our lives, including our basic constitutional rights. today, we will hear testimony from christopher wylie, who served as a research director at cambridge analytica from june of 2013 until november of 2014. i understand he will be able to share insight into some of these significant questions based on his first-hand experience, so i very much look forward to hearing from mr. wylie, and i thank you again, mr. chairman, for holding these hearings. -- this hearing. sen. grassley: i will now introduce witnesses. after i do that, i ask you to stand and be sworn in. it was also our

analytica group companies in june of 2013, in may of 2014 the group received facebook data from aleksandr kogan. you stopped working for the group in july 2014. in early 2016, facebook contacted the group and yourself and asked that facebook data received from mr. kogan be deleted. in march of 2017 following an internal audit, the group certified it had purged all of mr. kogan's facebook data from its servers. the group was retained by the trump campaign in the summer of 2016, so i think these three questions will be easy. cambridge had not been retained by the trump campaign during your employment? mr. wylie: when i worked at cambridge analytica, the trump campaign was not, no. sen. grassley: and you did not work for the trump campaign while at cambridge? mr. wylie: i have never worked for the trump campaign. sen. grassley: and you were not there with the company made its certification to facebook? mr. wylie: i was not in the company or engaged at the company when they had that dealing with facebook, no. sen. grassley: thank you. dr. hirsch, there has been a lot of media attention around alleg