On Friday night, Facebook released a statement banning Cambridge Analytica, a data operations team that worked on the Donald Trump campaign for breaking the social network's terms of service regarding data collection about users. It's not a typical breach--in fact, Facebook is careful to point out that it's not technically a breach at all--but reports say information about likes, locations, and names are compromised for up to 50 million users. Check out The Intercept's reporting on the subject here.

NPR's Mary Louise Kelly speaks with Pennsylvania Attorney General Josh Shapiro about his office's intent to look into how the data of 50 million Facebook users got into the hands of the political data-mining firm, Cambridge Analytica.

The Facebook logo is displayed on an iPad. WASHINGTON -- Revelations that a political data firm may have gained access to the personal information of as many as 50 million Facebook users drew new calls on Capitol Hill on Monday for Facebook CEO Mark Zuckerberg and the heads of other social media companies to testify before Congress about the possible privacy breach. Two members of the Senate Judiciary Committee, Democrat Amy Klobuchar of Minnesota and Republican John Kennedy of Louisiana, asked Chairman Chuck Grassley, R-Iowa., to hold a hearing so senators can publicly grill the CEOs. "Facebook, Google, and Twitter have amassed unprecedented amounts of personal data and use this data when selling advertising, including political advertisements," the senators wrote in a letter to Grassley. "The lack of oversight on how data is stored and how political advertisements are sold raises concerns about the integrity of American elections as well as privacy rights." The congressional calls for additional scrutiny come after Facebook on Friday confirmed that it had suspended a data analytics firm, Cambridge Analytica, from operating on its platforms as it investigated whether the firm failed to delete information that Cambridge Analytica had received through an academic researcher.

Legislators for the European Union have announced an investigation after allegations user data of 50 million Facebook accounts were misused. The investigation comes after Christopher Wylie, a whistle-blower who worked for data analytics company Cambridge Analytica, said on Saturday data of the 50 million users were harvested without their knowledge or consent. Antonio Tajani, president of the European Parliament, said on Twitter the allegations, if true, constitute "an unacceptable violation of our citizens' privacy rights". "The European Parliament will investigate fully, calling digital platforms to account," he said. Allegations of misuse of Facebook user data is an unacceptable violation of our citizens' privacy rights.

Wyden, an influential senator on technology issues, asked the company how many times during the past ten years Facebook is aware of third parties collecting or processing data in violation of the company's platform policies, among several other questions.

Facebook said in a statement on Friday that it had learned in 2015 that a Cambridge University psychology professor had lied to the company and violated its policies by passing data to Cambridge Analytica from a psychology testing app he had built. Facebook said it suspended the firms and researchers involved.

Wylie left Cambridge Analytica in 2014, and it's not clear how the firm targeted people with misinformation during the 2016 presidential campaign. What is clear is that two-thirds of Americans get at least some of their news on social media, according on Pew Research Center, and about 20 percent do so "often." While people don't exist in a Facebook-only vacuum, it is possible that bogus information users saw on the site could later be reinforced by the "rabbit hole" of clicks and conspiracy sites on the broader internet, as Wylie described.

Downing Street expressed its concern for the Facebook data breach that affected tens of millions of people involving the analytics company that worked with Donald Trump's campaign team. No 10 weighed in on the row as almost $20bn (£14bn) was wiped off the social network company's market cap in the first few minutes of trading on the Nasdaq stock exchange, where Facebook opened down more than 3%. After less than two hours trading, the company's losses had multiplied to almost $30bn. Theresa May's spokesman said she backed an investigation by the information commissioner, which was prompted by a whistleblower who told the Observer how Cambridge Analytica harvested millions of Facebook profiles to influence voters through "psychographic" targeting. The European parliament president, Antonio Tajani, also said on Monday that the institution would "investigate fully".

WASHINGTON – Several U.S. Republican lawmakers expressed concern over privacy violations on Sunday after media reports that a political consultancy that worked on President Donald Trump's campaign gained inappropriate access to 50 million Facebook users' data. Republican Sen. Marco Rubio said he believed some internet companies have grown too fast to digest their responsibilities and obligations. "So we'll learn more about this in the days to come. But yeah I'm disturbed by that," Rubio told NBC's "Meet the Press." Sen. Rand Paul was asked whether people can trust companies like Facebook in the wake of the report about Cambridge Analytica taking data.

Facebook's business model is actually focused on not giving third parties data about its users,