The US Supreme Court is holding the last session of its current term today (June 26)-and it is the final chance the justices will have to settle several weighty issues before the court's annual summer recess.
Trump had revised and rewritten his executive order, and it now affects only the issuance of new visas to people from six Muslim majority countries: Iran, Sudan, Somalia, Libya, Yemen and Syria.
"It also could lead to legal challenges amid the "struggle to determine what exactly constitutes a "bona fide relationship, ' who precisely has a "credible claim" to that relationship, and whether the claimed relationship was formed 'simply to avoid" the travel ban", he wrote.
In a statement, Trump called the ruling "a clear victory for our national security".
"I want people who can love the United States and all of its citizens, and who will be hardworking and productive."
Any announcement could come after the court has finished issuing its rulings on Monday morning.Kennedy has repeatedly declined to respond to media requests seeking comment on his plans.
And in October, the justices of the court will hear full arguments on why it should go ahead.
If he does end up retiring, the Supreme Court might lose its swing vote. He has written the majority opinion in all of the court's major gay-rights cases. Depending on the results of the review, Trump could push to extend the measure, or even make it permanent.
The countries targeted were on a list from the previous Obama administration of places where the governments had very poor data on their own citizens, making it hard to vet the identities of visa applicants. Those groups said they will be sending lawyers and monitors back to American airports, where the initial, immediate implementation of the ban in January caused chaos and confusion.
Associate Justices Samuel Alito, Clarence Thomas and Neil Gorsuch, the most conservative members of the court, partially dissented.
There had been speculation that Supreme Court Justice Anthony Kennedy could reveal his retirement from the court Monday.
Republicans, many of whom actively worked against Trump's unorthodox candidacy, have been reluctant to oppose him after he was sworn in as they relished the thought of the first GOP White House and Congress in a decade succeeding in pushing a conservative agenda.
"The executive order cites unfortunate incidents like 9/11 but fails to account for the countries where those perpetrators were from", Taheran said.
"Immigration, even for the president, is not a one-person show", the three justices of the Ninth Circuit Court of Appeals said in a ruling earlier this month.
But instead, his administration regrouped and issued a second order in March. It called for suspending the US refugee program for 120 days, banned Syrian refugees indefinitely and barred citizens of seven Muslim-majority countries from entering the United States for 90 days.
A lack of a clearly defined relationship would bar from entry people from the six countries and refugees with no such ties.
"National security is not a talismanic incantation that, once invoked, can support any and all exercise of executive power", they added. Chuck Grassley and Ted Cruz said they expect another vacancy on the Supreme Court this year.
But Professor Schlanger said the move was more about politics than national security. The overwhelming majority, according to the New America Foundation, were US citizens or legal residents; restricting travel by Texans and Virginians would have affected more of them than Trump's order.
"It is true that the travel ban is allowed to go into effect, but the Supreme Court substantially narrowed who could be denied entry". "You know why? Supreme Court judges, Supreme Court judges". For an already highly vetted population, this ruling will only create more harm and difficulties.
The court tempered its ruling by saying the ban could not be implemented against people who have personal links to the U.S., citing the examples of foreign nationals wishing to visit family or students accepted to attend university.