James Murdoch, the youngest son of Rupert Murdoch, has resigned from the board of the familys newspaper assets, News Corporation, according to a regulatory filing.

Murdoch, whose brother Lachlan runs Fox Corp., which houses Fox News, tendered his resignation effective immediately.

The filing stated: Mr. Murdoch informed the company that his resignation was due to disagreements over certain editorial content published by the Companys news outlets and certain other strategic decisions.

James Murdoch, who owns a stake in media outlet Vice, does not share his father’s conservative politics.