https://www.reuters.com/article/us-facebook-zuckerberg/facebooks-zuckerberg-says-warren-as-u-s-president-would-be-bad-for-tech-idUSKBN1WG42H >Facebook Inc Chief Executive Officer Mark Zuckerberg told employees in July that the company would "go to the mat" to defeat Democratic candidate Elizabeth Warren's expected effort to break up the world's largest social media company if she were elected president, according to audio of two internal company meetings from July published by The Verge.