Elon Musk has been promising to protect free speech on Twitter since he bought it back in October, but he's actually been banning journalists and anyone critical of his management style.  

Yesterday, he even suspended the Twitter account of another social media platform, Mastodon.

For more, we're joined on the KCBS Ring Central Newsline by Joshua Tucker - a professor at New York University and co-director of the NYU Center for Social Media and Politics.