Working with two whistleblowers who helped set up Cambridge Analytica, the Observer and Guardian have spent a year analysing documents, gathering eyewitness reports and working with whistleblowers to untangle a highly complex story of elections in the digital age. In this series we expose:
Cambridge Analytica is currently being investigated on both sides of the Atlantic. It is a key subject in two inquiries in the UK — by the Electoral Commission, into the firm's possible role in the EU referendum and the Information Commissioner's Office, into data analytics for political purposes — and one in the US, as part of special counsel Robert Mueller's probe into Trump-Russia collusion.