He told Recode he is open to testifying before Congress — if he is the right Facebook executive to do so.

I’m open to doing that… We actually do this fairly regularly … There are lots of different topics that Congress needs and wants to know about, and the way that we approach it is that our responsibility is to make sure that they have access to all of the information that they need to have.

CNN: Do you believe Facebook impacted the 2016 election?

That is hard. It’s really hard for me to have a full assessment of that.

CNN: Given the stakes, why shouldn’t Facebook be regulated?

I actually am not sure we shouldn’t be regulated.