Hunter Biden and his attorneys have sent a letter making several demands of Fox News, including one that threatens litigation if the network does not remove content from its website that includes sexually explicit images of the president’s son.

The letter also demands that Fox News issue a retraction or correction to news coverage about allegations that the Biden family was bribed by a Ukrainian oligarch. Much of that coverage was based on information from Alexander Smirnov, an FBI informant who said he had ties to Russian intelligence and has since been charged with lying about the matter by the Justice Department.