Rep. John Ratcliffe, R-Texas, and retiring Rep. Trey Gowdy of South Carolina, have also joined the list of those in the running, the sources say.

Ratcliffe, a former political appointee of President George W. Bush who was later appointed to be U.S. Attorney of the Eastern District of Texas, has become a top candidate…

Other names that have been discussed include Noel Francisco, the current solicitor general of the United States, who was appointed by Trump last year. Trump’s Health and Human Services secretary Alex Azar is also a contender, sources tell NBC News…

Andrew McCarthy, a former assistant U.S. attorney for the Southern District of new York and current columnist for the National Review, is also said to be under consideration. McCarthy is a common guest on Fox News, which Trump appreciates in an official.