Read the amicus curiae ("Friend of the Court") brief: https://www.aclu.org/sites/default/files/field_document/297-1_0.pdf
Read more about the issue: https://www.aclu.org/blog/speak-freely/governments-muslim-ban-guidance-arbitrary-illogical-and-discriminatory-just-ban
We are standing with International Refugee Assistance Project ("IRAP") and HIAS to fight the arbitrary rules the government has tried to impose and ensure that it complies with the Supreme Court’s ruling.