Now SCOTUS justice Kennedy has suspended this 9th circuit decision (termed a "mandate"), ahead of formal arguments, without any reasons even needing to be given since it's so obvious. Plus, Hawaii et al. have only until noon tomorrow to reply.
Supreme Court of the United States
DONALD J. TRUMP, PRESIDENT OF THE UNITED STATES, ET AL., Applicants v.
HAWAII, ET AL. ORDER
UPON CONSIDERATION of the application of counsel for the applicants,
IT IS ORDERED that the mandate of the United States Court of Appeals for the Ninth Circuit, case No. 17-16426, is hereby stayed with respect to refugees covered by a formal assurance, pending receipt of a response, due on or before Tuesday, September 12, 2017, by 12 p.m., and further order of the undersigned or of the Court.
/s/ Anthony M. Kennedy
Associate Justice of the Supreme Court of the United States
Dated this 11th day of September, 2017.