The trust document sets out what will happen to ownership of the media assets upon Murdoch’s death: His voting share will be transferred to the four oldest children. That could lead to a scenario in which the children are fighting over the future of the media assets. Fear of that outcome seems to have motivated Rupert Murdoch to seek this change to the trust.

Although Lachlan is now the chair of News Corp. and executive chair and CEO of Fox Corporation, the children have already aired some of their disagreements over the political direction of the media companies. For example, James and his wife have criticized Fox’s move to the right. Murdoch may well see this as a threat to the company’s business model, which caters to a conservative audience.