Several federal agencies launched their own probe into the massive Cambridge Analytica scandal after it exploded in 2018. That was when one of the political consulting firm's employees revealed that it harvested millions of Facebook users' data without their knowledge and used it for political purposes. At the moment, the social network is under investigation by the FTC, the FBI, the Securities and Exchange Commission and the Justice Department.

While the FTC doesn't typically hold executives accountable for their companies' business practices, both its Democratic members support targeting executives when appropriate. The commission even considered taking aim at Zuckerberg during its last settlement with the social network over another issue back in 2011, though it ultimately decided not to. If the agency does hold the executive accountable for his company's privacy problems, it could compel him to periodically certify Facebook's privacy practices with its board of directors. The FTC could also demand the right to keep a closer eye on the social network's activities.