don't pay for your service? >> senator, we run ads. >> i see. >> that's great. whenever a controversy like this arises, there's always a danger that congress's response will be to step in and overregulate. now that's been the experience that i've had in my 42 years here. in your view, what sorts of legislative changes would help to solve the problem that the cambridge analytica story has revealed and what sorts of legislative changes would not help to solve this issue? >> senator, i think that there a few categories of legislation that make sense to consider. around privacy specifically, there are a few principles i think it would be useful to discuss and potentially codify into law. one is around having a simple and practical set of ways that you explain what you're doing with data. we talked a little bit earlier