[imagesource:wikicommons] Rupert Murdoch's media empire and a $20.3 billion family trust are at the centre of a legal battle that started in the US on Monday. In the lawsuit, three of Murdoch's oldest children will compete to see who would have the most voting shares and the ability to run News Corp. and Fox News after his death. It has been reported that Murdoch wanted to amend a family trust created in 1999 so that son Lachlan could take control without "interference" from his siblings Prudence, Elisabeth and James. Murdoch has been married five times and has two younger children, Grace and Chloe, who do not have any voting rights under the trust agreement. According to Australian journalist and author of the biography Young Rupert: The Making of the Murdoch Empire, Walter Marsh, "This plan essentially seeks to put Prudence, James and Elisabeth on the same footing as Murdoch's two younger daughters." It's believed that "all voting power" could be handed over to Lachlan.