Someone should suggest to the evil clown
.. that he switch GPS 'selective availability' back on. This was the degradation of the american GPS signal to non military ground receivers, discontinued by Ronald Reagan.
In his flailing around trying to appear effective, he would probably consider it a good idea to bugger the worlds GPS accuracy.
Of course, it would not be any use. Professional GPS users use Real Time Kinematic or Post Processing to eliminate satellite errors, and there are now multiple different satellite constellations belonging to nations not under Trumps command.
The effect would be felt most by non-tech civilian users, relying on their GPS for road navigation, and commercial/agricultural/industrial users who want to keep their machinery inside their paddock or whatever.
The best thing is it would put him on a collision course with Google..