Per this Washington Examiner article, 2 of the 3 judges on the 4th Circuit were appointed by Obama and the other was appointed by Clinton.
The 4th Circuit used to be more conservative. When the Dems in the senate started filibustering Bush nominees several 4th circuit openings were unfilled. When Barry took office in 2008 with a Dem senate these slots were filled quickly. Gang of 14 didn’t help when they failed to implement the nuclear option.