Document ID: ./input/supremecourt_opinions/opinions/17pdf/17-965_h315.pdf
Page Number: 6.0

Cite as:  585 U. S. ____ (2018) 

1 

Opinion of the Court 

NOTICE:  This opinion is subject to formal revision before publication in the
preliminary  print  of  the  United  States  Reports.  Readers  are  requested  to
notify the Reporter of Decisions, Supreme Court of the United States, Wash-
ington,  D. C.  20543,  of  any  typographical  or  other  formal  errors,  in  order
that corrections may be made before the preliminary print goes to press. 

SUPREME COURT OF THE UNITED STATES 

_________________ 

No. 17–965 
_________________ 

DONALD J. TRUMP, PRESIDENT OF THE UNITED 

STATES, ET AL., PETITIONERS v. HAWAII, ET AL. 

ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF 

APPEALS FOR THE NINTH CIRCUIT
 

[June 26, 2018] 

CHIEF  JUSTICE  ROBERTS  delivered  the  opinion  of  the

Court. 

Under  the  Immigration  and  Nationality  Act,  foreign
nationals  seeking  entry  into  the  United  States  undergo  a 
vetting  process  to  ensure  that  they  satisfy  the  numerous 
requirements for admission.  The Act also vests the Presi-
dent  with  authority  to  restrict  the  entry  of  aliens  when-
ever he finds that their entry “would be detrimental to the 
interests of the United States.”  8 U. S. C. §1182(f).  Rely-
ing on that delegation, the President concluded that it was 
necessary  to  impose  entry  restrictions  on  nationals  of
countries  that  do  not  share  adequate  information  for  an
informed  entry  determination,  or  that  otherwise  present
national  security  risks.    Presidential  Proclamation  No. 
9645,  82  Fed.  Reg.  45161  (2017)  (Proclamation).    The 
plaintiffs  in  this  litigation,  respondents  here,  challenged 
the application of those entry restrictions to certain aliens 
abroad.  We now decide whether the President had author-
ity  under  the  Act  to  issue  the  Proclamation, and  whether 
the  entry  policy  violates  the  Establishment  Clause  of  the
First Amendment.