He knows the GOP will bend over when the time comes. No need for a recess appointment.
A recess appointment would get him more time to gin up some cases that would get fast tracked to the USSC that would article by article dismantle the Constitution. There are no liberals on the Court. There are 4 fanatic leftists on the Court and a wishy washy egotist. The Sultan would like to appoint a 5th fanatic and will do so if he can.