and the face of it is lena khan. >> we are law students, and we love you. >> could we have a selfie? khan was a student here at yale law school, she wrote a paper called "amazon's antitrust paradox" contending that even though amazon's prices are low, it's still a monopoly. >> this was seen as an extraordinary break through, and it went viral. >> less than five years later, president biden made her head of the agency that polices amazon. >> you know, amazon is a very popular company. people like the convenience, the choice. the prices are pretty moderate. and they're afraid that you're going to tamper with something that's good, that they like. >> our investigation uncovered that amazon's illegal practices were actually raising prices for consumers because it had illegally muscled out rivals, locked them out of the market in ways that if you had more competition that amazon hadn't squashed, consumers would be even better off. >> amazon denies doing anything illegal, and says if khan wins, prices will go up. also in the ftc's cross hairs, the issue of tech giants buying up smaller com