Lawyers for Hunter Biden plan to sue Fox News "imminently," according to a letter sent to the network and obtained by NBC News. 

The letter, dated April 23, puts the Fox News Channel and Fox News Digital on notice for litigation claims arising from the network's alleged "conspiracy and subsequent actions to defame Mr. Biden and paint him in a false light, the unlicensed commercial exploitation of his image, name, and likeness, and the unlawful publication of hacked intimate images of him." 

Biden has hired attorney Mark Geragos and his firm to represent him in the Fox litigation efforts. The letter is the second outreach to Fox this month. An earlier letter was hand-delivered to Fox's counsel two weeks ago, and the network asked for more time to respond, according to a source familiar with Biden's legal efforts.