Facebook is facing new pressure from the Federal Trade Commission. 
 
 The FTC is sending a letter to Facebook Tuesday with questions about how the social media company allowed the data of more than 50 million users to wind up in the hands of Trump campaign consultants, a Facebook source told CNN. 
 
 Rob Sherman, Facebook's deputy chief privacy officer, said in a statement, "We remain strongly committed to protecting people's information. We appreciate the opportunity to answer questions the FTC may have." 
 
 The FTC would neither confirm nor deny the status of its inquiry into Facebook. 
 
 "We are aware of the issues that have been raised but cannot comment on whether we are investigating," an FTC spokesperson said. "We take any allegations of violations of our consent decrees very seriously as we did in 2012 in a privacy case involving Google." 
 
 The FTC's inquiry comes as Facebook faces unprecedented public scrutiny over its handling of the Cambridge Analytica scandal. Facebook sources have told CNN they believe it will take a Herculean effort to restore public trust in the company's commitment to privacy and data protection. 
 
 Related: Fed up with Facebook? Here's how to protect your data 
 
 In addition to the FTC's interest, Sens. Amy Klobuchar and Mark Warner have called on CEO Mark Zuckerberg to testify before Congress. "The American people deserve answers about social media manipulation in the 2016 election," Warner tweeted. 
 
 In the U.K., MP Damian Collins sent a letter to Zuckerberg asking him to testify before the Digital, Culture, Media and Sport Committee. 
 
 Facebook representatives will also go to Capitol Hill this week to brief staff for the House and Senate Intelligence, Judiciary and Commerce committees on the scandal, a company spokesperson told CNN. 
 
 And on Tuesday afternoon Facebook held a staff-wide meeting in Menlo Park to address questions about the company's work on data privacy. The meeting was to be led by deputy general counsel Paul Grewal. ||||| FILE - In this Aug. 27, 2009 file photo, the site Facebook login webpage is seen on a computer screen in Ottawa, Canada. Mozilla, Tesla and other companies are distancing themselves from Facebook following... (Associated Press) 
 
 FILE - In this Aug. 27, 2009 file photo, the site Facebook login webpage is seen on a computer screen in Ottawa, Canada. Mozilla, Tesla and other companies are distancing themselves from Facebook following revelations of a major leak of user data to political consultants associated with the 2016 Trump... (Associated Press) 
 
 FILE - In this Aug. 27, 2009 file photo, the site Facebook login webpage is seen on a computer screen in Ottawa, Canada. Mozilla, Tesla and other companies are distancing themselves from Facebook following revelations of a major leak of user data to political consultants associated with the 2016 Trump... (Associated Press) FILE - In this Aug. 27, 2009 file photo, the site Facebook login webpage is seen on a computer screen in Ottawa, Canada. Mozilla, Tesla and other companies are distancing themselves from Facebook following... (Associated Press) 
 
 NEW YORK (AP) — The Latest on reports that millions of Facebook users' data was used to target political ads (all times local): 
 
 10:50 a.m. 
 
 The Federal Trade Commission is investigating Facebook's privacy practices following a week of privacy scandals including whether the company engaged in "unfair acts" that cause "substantial injury" to consumers. 
 
 Facebook's stock, which already took a big hit last week, plunged as a result. 
 
 Facebook said in a statement on Monday that the company remains "strongly committed" to protecting people's information and that it welcomes the opportunity to answer the FTC's questions. 
 
 News outlets have reported on the FTC investigation last week, but the FTC hadn't confirmed it until Monday. Facebook reached a settlement with the FTC in 2011 offering privacy assurances. 
 
 ___ 
 
 5 a.m. 
 
 Facebook CEO Mark Zuckerberg is promising to do a better job protecting user data following reports that a political consultant misused the personal information of millions of the company's subscribers. The fact is, European regulators are already forcing him to do so. 
 
 A similar data breach in the future could make Facebook liable for fines of more than $1.6 billion under the European Union's new General Data Protection Regulation, which will be enforced from May 25. The rules, approved two years ago, also make it easier for consumers to give and withdraw consent for the use of their data and apply to any company that uses the data of EU residents, no matter where it is based.
– The Federal Trade Commission is investigating Facebook's privacy practices following a week of privacy scandals including whether the company engaged in "unfair acts" that cause "substantial injury" to consumers, the AP reports. Facebook's stock, which already took a big hit last week, plunged as a result. Facebook said in a statement on Monday that the company remains "strongly committed" to protecting people's information and that it welcomes the opportunity to answer the FTC's questions. News outlets reported on the FTC investigation last week, but the FTC hadn't confirmed it until Monday. Facebook reached a settlement with the FTC in 2011 offering privacy assurances. (Cambridge Analytica isn't Facebook's only current privacy scandal.)