The future of the Murdoch media dynasty, a powerful empire that has shaped conservative politics across the English-speaking world for decades, is about to be hashed out in an unlikely venue: a nondescript probate court in Reno, Nevada. Surrounded by parking lots and across the road from a business named “Bail Bonds Unlimited”, it is this courthouse in downtown Reno where Rupert Murdoch and his eldest son Lachlan are set to face off against three of his other children: James, Elisabeth and Prudence. Murdoch, 93, wants to change the trust he set up in 1999 which grants each of the...