The lawsuit targets billionaires including Zuckerberg, Sheryl Sandberg, Marc Andreessen, Peter Thiel and Reed Hastings—along with Biden’s former chief of staff.

An $8 billion trial by Meta Platforms shareholders against Mark Zuckerberg and other current and former company leaders kicked off on Wednesday over claims they illegally harvested the data of Facebook users in violation of a 2012 agreement with the U.

Investors allege in their lawsuit that Meta did not fully disclose the risks that Facebook users’ personal information would be misused by Cambridge Analytica, a firm that supported Donald Trump’s successful Republican presidential campaign in 2016.