https://www.cnet.com/news/cambridge-analytica-must-hand-data-to-us-citizen-says-british-regulator/

It looks like Cambridge Analytica, the firm behind the recent Facebook data scandal, may be forced to tell a US citizen what data it held on him and how it was being used. And it took a UK regulator to make it happen.

The development could clear the way for millions of other Americans to demand info on their data too.