propaganda inspired films, had run the conservative breitbart news. but in 2014, he was looking for yet another tool in his arsenal. and he found it by creating cambridge analytica. this was steve bannon s baby. reporter: this former employee says from his first meeting with bannon, it was clear the goal. not to push a single campaign or candidate, but to fundamentally change america. he sees this as warfare, so he is going to use as aggressive techniques as he can get away with. you are talking about warfare on the american citizenry. this is steve bannon and robert mercer using a foreign military contractor to use some of the same techniques that the militaries use to fight isis on the american electorate. that s what they wanted. and that s what they got. reporter: cambridge analytica is a subsidiary of the british scl group. for 25 years the military
the secretive consulting firm cambridge analytica known for developing strategies for the trump campaign in 2016 now finds itself at the center of a controversy over privacy and social media. our senior investigative correspondent drew griffin has been gathering lots of details on the firm. what can you tell us about the origins of cambridge analytica and how they came to work for trump s campaign. they came together because of one man, steve bannon, and what former colleagues say is that bannon believed he was fighting a culture war. cambridge analytica was born out of steve bannon s alt-right vision for america. he had already produced propaganda inspired films hflt run the ultra conservative
considered for trump s chief of staff. he became trump s campaign ceo back in august. he was also the executive chairman of the conservative breitbart news. the 62-year-old bannon previously worked for goldman sachs as an investment banker. he s also a conservative filmmaker and a former u.s. naval officer. well, we began by talking about the protests. at least 25 american cities have seen large groups of anti-trump protests since tuesday s election. even here in atlanta where our gary tuckman went out on the streets to find out why people are so upset. reporter: a combination of anger and disbelief on the streets of atlanta, georgia. hundreds of people marching through the city expressing their opposition to donald trump being president. these people have been marching for about two miles now. they re angry because he became president and also they can t believe he became president. most people acknowledged when they went to bed tuesday night or stayed up into wednesday morning