Donald Trump Jr. expressed his exasperation at House Democrats during a Thursday interview with Tucker Carlson, reacting to former special counsel Robert Mueller's testimony on Capitol Hill.

Trump Jr. claimed Mueller did not know who was truly running his investigation and that the "inmates were running the asylum" during the two-year inquiry.

He also asserted that Mueller was used as a "figurehead" for the Democrats who were "doing whatever they could to destroy my father's presidency." He said that the Democratic Party thought Mueller, a former FBI director and decorated military veteran, was someone the American people would trust, even though "this guy put in 19 leftist, Hillary Clinton donor lawyers ... [Mueller] had no idea who was running the ship." By continuing to pursue impeachment, Trump Jr. claimed, the Democrats are obstructing his father's efforts to get laws passed that could help the American people.

Trump Jr. was also under scrutiny during Mueller's investigation for his alleged involvement in receiving opposition information on Hillary Clinton during his father's presidential campaign.