In a court filing, John Kelly, who was a chief of staff under Donald Trump, said the former president had asked about having the tax agency look into Peter Strzok and Lisa Page.
The demand for interviews with more than a dozen federal officials comes as the G.O.P. hunts for evidence that the government improperly protected the president’s son from felony prosecution.
An I.R.S. investigator’s testimony describing strains over the inquiry into President Biden’s son is at odds with the version laid out by Attorney General Merrick Garland.