The justices, however, said the ban on travel can not be enforced against "foreign nationals who have a credible claim of a bona fide relationship with a person or entity in the United States".
The U.S. Department of Homeland Security said implementation of the travel order "will be done professionally, with clear and sufficient public notice, particularly to potentially affected travelers, and in coordination with partners in the travel industry". However, the Trump administration appealed to the Supreme Court. "I will keep fighting for the American people, & WIN!"
In a unanimous opinion, the high court struck down two lower court orders that put a hold on the travel restrictions, freeing the Trump administration to impose a freeze on new visas from six Muslim-majority countries (Iran, Libya, Somalia, Sudan, Syria and Yemen) for 90 days.
Some immigration lawyers said the limited nature of the ban and the silence of the court's liberals on the issue Monday suggested that the court had not handed Trump much of a victory. The U.S. Supreme Court said Monday that President Donald Trump's travel ban on visitors from.
After all, in agreeing to hear the case in October, the justices could have left the temporary stay in place pending a final ruling. "The Supreme Court now has a chance to permanently strike it down".
"We will never give up defending the rights of those who are affected by this discriminatory executive order", said Becca Heller, director of the International Refugees Assistance Project, one of the parties in the Supreme Court case.
The fate of refugees, who often don't have relatives or jobs waiting for them in the US, also hangs in the balance.
Three of the court's conservative justices said they would have let the complete bans take effect.
"President Trump's Muslim ban violates the fundamental constitutional principle that government can not favor or disfavor any one religion", Omar Jadwat, director of the group's immigrants' rights project, said. The high court is letting a limited version of the Trump administration ban on travel from six mostly Muslim countries to take effect, a victory for President Donald Trump in the biggest legal controversy of his young presidency.
But, the court said the injunctions were too broad to also include barring enforcement of the ban against foreigners who have no connection to US.
The officials say the Yemenis were allowed to board EgyptAir flight 985 to John F. Kennedy airport early on Tuesday because Cairo airport authorities had yet to receive official instructions from the United States on how to implement the ban. The order said these steps were necessary in order to revise security screening to safeguard the nation from external threats.
Groups that challenged the ban, including the American Civil Liberties Union, said that most people from the affected countries seeking entry to the United States would have the required connections.
The court said the distinction should be easy to administer. This is due to their potential inability to prove a relation to the United States that the Court's ruling calls for.
Mark Hetfield, president and CEO of the Hebrew Immigrant Aid Society, said Trump's order reminds him of a time when Jewish refugees were turned away to tragic result.