I’m sure Trump doesn’t know every single judge.
So he goes to people he trusts for recommendations,
then he takes it from there.
Judges can be very, very secretive as to their true agenda when the appointment to the Supers releases them from all accountability to the populace. Trust the history of them. Trump does not even have legal training, how could he alone execute a wise, tutored selection that at best only seems to be a wild guess. Click on this:
"Justices Often Surprise the President Who Picks Them"