Brittany Kaiser is a data rights activist and whistleblower of Cambridge Analytica, the political consulting firm that harvested the data of 87 million Facebook users and did work for Donald Trump's 2016 campaign. She is the author of "Targeted: The Cambridge Analytica Whistleblower's Inside Story of How Big Data, Trump, and Facebook Broke Democracy and How It Can Happen Again" and is a subject of the documentary film "The Great Hack."