Presidential Proclamation 9645 did not violate the INA or the Establishment Clause by suspending the entry of aliens from several nations. Substantial deference must be accorded to the Executive in the conduct of foreign affairs and the exclusion of aliens. Decided June 26, 2018 (argued April 25, 2018). Opinion of the Court: John Roberts → go there Dissenting: Breyer, Sotomayor. Applied: the First Amendment → go there Topic: Foreign. Trump v. Hawaii, 585 U.S. 667 (2018), is a landmark decision of the United States Supreme Court involving Presidential Proclamation 9645 signed by President Donald Trump, which restricted travel into the United States by people from several nations, or by refugees without valid travel documents. Hawaii and several other states and groups challenged the Proclamation and two predecessor executive orders also issued by Trump on statutory and constitutional grounds. Citing a variety of statements by Trump and administration officials, they argued that the proclamation and its predecessor orders were motivated by Islamophobic animus. Wiki link