FTC opens investigation into Facebook data protections

Facebook's CEO apologized on Sunday for a "breach of trust."

The FTC probe comes amid reports that data analytics firm, Cambridge Analytica, allegedly misused Facebook data from up to 50 million user profiles. Some members of Congress and privacy advocates have pushed for the FTC to look into whether the matter violates a 2011 consent decree in which Facebook said it would uphold a number of privacy protections.

Cambridge Analytica has also previously said it was unaware the data was improperly obtained by a third party and that it was destroyed as soon as they were made aware.

That third party, Aleksandr Kogan, the Cambridge University researcher who collected information on millions of Americans through Facebook for Cambridge Analytica, told ABC News that both the social media giant and the data firm are making him a “scapegoat.”

The Trump campaign has said it never used data from Cambridge Analytica.

Cook County in Illinois is suing Facebook and Cambridge Analytica for "harvesting of Facebook user data" and Facebook for not protecting the data.

Additionally, 37 state attorneys general sent a letter to Facebook Monday demanding to learn more about the social network's practices, privacy protections and the scope of the data breach.

ABC News’ Lucien Bruggeman contributed to this report.