Facebook faced new calls for regulation from within U.S. Congress and was hit with questions about personal data safeguards on Saturday after reports a political consultant gained inappropriate access to 50 million users' data starting in 2014.
Facebook disclosed the issue in a blog post on Friday, hours before media reports that conservative-leaning Cambridge Analytica, a data company known for its work on Donald Trump's 2016 presidential campaign, was given access to the data and may not have deleted it.
The scrutiny presented a new threat to Facebook's reputation, which was already under attack over Russians' alleged use of Facebook tools to sway American voters before and after the 2016 U.S. elections.