Actually it's a blow to the administration, which wanted to prevent the entry into the US of people with family or legitimate business in the US, from six named nations, none of which has ever sent a terrorist into our nation. Those people can now enter. The two possibilities that most Supreme Court-watchers think is most likely are that the Supreme Court will rule that the ban is based on religion and therefor illegal, or that Trump will let the ban quietly lapse before the Supreme Court hears the case.

Trump said before many witnesses (millions) during his campaign and after his inauguration, that he would ban the entry of Muslims into the US. Members of Trump's administration have confirmed the purpose. Banning persons on the basis of religion has already been found to be unconstitutional.