Mister Barton from Texas reminds everyone that Zuckerberg is here because he volunteered. Barton picks up where Ted Cruz left off yesterday asking about conservative groups that he feels were unfairly targeted. Zuckerberg says the account he mentioned was subject to an "enforcement error." Barton then proposes a total ban on data sharing on users under 18. Zuckerberg points out user controls, but the language is too vague here for this to really mean anything. Barton's point about having to "work at it," to make your account private is well-received, though.