Possibly. My first thought was that they want to drag this out as long as possible and squeeze in as many "refugees" as they can before President Trump brings the hammer down. They know they're on thin ice.
No, this is about the court.
One of the three, I suspect the old guy, is seeking to remove the egg thrown by the president from the court’s face.
By overturning the stay
By confirming the stay
Given the odious nature of the lawless progressive court< I suspect the latter