Fox chief Rupert Murdoch to be deposed in $1.6 billion Dominion defamation caseJan 19 (Reuters) - Fox Corp (FOXA.O) Chairman Rupert Murdoch will be questioned under oath on Thursday and Friday in a defamation lawsuit over his network’s coverage of unfounded vote-rigging claims during the 2020 U.S. presidential election.Election technology company Dominion Voting Systems says Fox News Network amplified false claims that its machines were used to rig the election against Republican Donald Trump and in favor of his Democratic rival Joe Biden, who won the election."From the highest levels down, Fox knowingly spread lies about Dominion," the election machine company said in a statement.Doug Mirell, a defamation lawyer who has followed the litigation, said he believes Dominion has an "air-tight" case for actual malice because Fox hosts pressed forward with vote-rigging allegations "well after it was quite clear that these claims were demonstrably false."The complaint cited instances in which Trump allies like Rudy Giuliani and Sidney Powell appeared on Fox News and falsely claimed Dominion software may have manipulated vote counts in favor of Biden."