https://www.theguardian.com/technology/2019/oct/01/mark-zuckerberg-facebook-elizabeth-warren-big-tech > Leaked recordings published by the Verge show Zuckerberg fears ‘existential threat’ if Democratic contender becomes president > Facebook chief executive Mark Zuckerberg has said his company will “go to the mat” if Elizabeth Warren is elected president and seeks to fulfil her promise to break up America’s tech giants.