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 published by The Verge.

"If she (Warren) gets elected president, then I would bet that we will have a legal challenge and I would bet that we will win the legal challenge. And does that still suck for us? Yeah. I mean, I don't want to have a major lawsuit against our own government," he said, according to the leaked audio.

Warren, who in March called for breaking up Amazon.com Inc., Facebook Inc. and Alphabet Inc., quickly issued a retort on Twitter.