Meet the billionaire who loves Fox News and owns a piece of CNN

CNN is in flux. It has a new owner, and a new boss, who promises to remake the news channel and has told employees to be prepared for “a time of change.”

Most of those changes have yet to manifest. But one of the first ones — canceling its long-running Reliable Sources show and pushing out anchor Brian Stelter — has already unsettled some CNN employees and viewers.

But the bigger question floating over one of the world’s largest and most important news organizations is why it’s changing. Is it...