James Murdoch and his brother Lachlan are sons of Rupert Murdoch. Lachlan, like his father Rupert, is conservative. James is a lefty.
Rupert, in his 80s, stepped away from day-to-day responsibilities a few years ago. Lachlan and James shared executive responsibilities ( a mixed bag that I don't pretend to understand) while Rupert remained co-chariman on paper. James was having lefty tantrums because Fox News wasn't just another left-wing kook news operation like the others. James had one too many lefty tantrums... bye bye.