That "travel ban" refers to an executive order that temporarily bans people from six Muslim-majority countries from entering the U.S. In a decision handed down Monday morning, the court partially lifted the injunctions that blocked the administration's controversial order.
The ruling would remain in force until the court hears the case in full in October.
Americans United also represents the plaintiffs in Universal Muslim Association of America v. Trump, a lawsuit we filed with our allies Muslim Advocates, the Southern Poverty Law Center and the law firm Arnold & Porter Kaye Scholer LLP. Justice Anthony Kennedy wrote in a 2015 immigration case that a "legitimate and bona fide" reason for denying entry to the United States can pass muster.
The administration has said the travel ban is needed to allow time to implement stronger vetting measures, although it has already rolled out some new requirements not blocked by courts, including additional questions for visa applicants.
While the ban itself did not single out Muslims, the judges cited Trump's repeated statements during last year's presidential race that he meant to ban Muslims from entering the United States.
As such, most of the president's order will take effect within the next few days.
The president casts the travel ban as critical to deterring possible terrorist attacks in the United States. Supporters said the ban was only for three months, giving the new administration time to develop "extreme vetting" procedures to reduce the probability that terrorists enter the US from these countries.
Chief Justice John Roberts and Justice Anthony Kennedy - who has been considering retirement - both joined the majority opinion that agreed to keep parts of the ban on hold until oral arguments this fall.More news: Five GOP senators now oppose health bill
A 120-ban on refugees also is being allowed to take effect on a limited basis.
Three of the court's conservative justices said they would have let the administration apply the bans without the limits imposed by their colleagues.
The justices will hear arguments in the case in October.
"To prevent the government from pursuing that objective by enforcing 2 (c) against foreign nationals unconnected to the United States would appreciably injure its interests, without alleviating obvious hardship to anyone else", the Court wrote.
"Today's unanimous Supreme Court decision is a clear victory for our national security", Trump said in a statement released by the White House. The plans were described by a senior official who was familiar with them, speaking on condition of anonymity because this person was not authorized to discuss them publicly by name. And there are many who do have a connection to our country against whom the government can not do a thing: worldwide students, family members of USA citizens or permanent residents, specialized immigrant workers, refugees who are already in transit. This will allow the government to refuse entry to refugee claimants who do not have any "bona fide relationship" with an American individual.
That means those wishing to visit the US from those six nations must prove they have a familial relationship with someone in the U.S.in order to visit.
Willaims said, "The constitutional rights are not the people [without bona fide claims] wanting to come to the US, the Constitution doesn't apply to them".
Trump had suffered a series of judicial defeats over the ban, with two federal appeals courts maintaining injunctions on it by arguing that his executive order discriminated against travelers based on their nationality.