3 important questions from Mark Zuckerberg's Senate hearing that Facebook still hasn't answered

Leading up to the 2016 presidential election, Russian troll farm Internet Research Agency (IRA) paid for 80,000 Facebook ads that were designed to further the divide between Americans, by appealing to hot-button issues like race and religion.

Senator Amy Klobuchar (D-MN) asked Zuckerberg if Facebook has determined whether any of the 126 million Americans that may have been exposed to those ads overlapped with the millions of users — about 70 million Americans — whose data was shared with Cambridge Analytica.

"Senator, we're investigating that now," Zuckerberg responded. "We believe that it is entirely possible that there will be a connection there." The question wasn't addressed in the documents, however.

During an interview following his initial reveal, Wylie said the user data his company obtained might be stored in Russia, according to Senator Klobuchar. She asked Zuckerberg if he agrees that that's a possibility.

He responded by saying he had no specific knowledge that would suggest that, and added that Facebook is "committed to completing this full audit and getting to the bottom of what's going on here, so that way we can have more answers to this." The question went unaddressed in the follow-up document as well.

In May, Wylie told Senators in his own hearing, "I can't say definitively, one way or the other, if these data sets did end up in Russia but what I can say is that it would have been very easy to facilitate that."

The responses to the House — which had an additional 10 days after the hearing to send in questions to Facebook — are due by June 29. But House Democrats reportedly expected to get their answers a little sooner than the deadline they imposed, according to Gizmodo's Dell Cameron, especially to those they felt Zuckerberg had inadequately answered during his testimony.

But Facebook says it received over 2,000 questions from the US Senate committees and House committee, and that it's doing the best it can to keep that promise.