I dug up the
Rosen interview from March 17, 2017, so he departed from Fox more recently than I recalled. This clip shows him drawing a variety of things, from renditions of famous people to comics characters in a Neal Adams style.
Rosen was also on Tucker Carlson's show interviewed a previous time on
Jan 24, 2017, though he didn't draw any pages during that interview. I'd forgotten that he does good voice impressions of people, such as Trump, Obama, and former Senator Richard Lugar.