her. also, ted cruz and ben carson hired cambridge analytica to build what is r. called psycho graphic profiles of all the voters. what's out big deal? trace gallagher live in our west coast newsroom with the back story on all of this. hi, trace. >> hi, martha. in 2013 cambridge analytica called this is your digital life to be used in psychology research. facebook allowed users to download the appear and 270,000 did answering questions about their education, location, work history, and political affiliation. but, instead of just gathering information on those who downloaded app., cambridge also had access to their friends' list and their friends' friends list. so 270,000 users became 50 million. cambridge then sold those profiles and information to a political intelligence firm called cambridge analytica. a former cambridge analytica employee and whistleblower says all that data was then politically weaponized. watch. >> this data was used to