SCOTUS suggested that the 9th Circuit expedite this.
Petition for a writ of certiorari before judgment DENIED without prejudice. It is assumed that the Court of Appeals will proceed expeditiously to decide this case.Docket for 17-1003
If the 9th Circuit does not move fast, and experience shows it can move fast, see immigration cases, I bet the Solicitor General is back to SCOTUS with a request for reconsideration in light of 9th Circuit delay.
I hope that you’re correct - because we pretty much know that the 9th Circus will rule to sustain the lower court’s ruling, and it’d be “nice” (meaning “damned important”) to see what the Supremes think in this day and age of an Executive Order having the force of a duly-passed law.