At the request of the Justice Department, the Supreme Court put a hold on a lower court ruling that would have exempted some people from Trump's ban on refugees. The ruling would have allowed refugees to enter the country if they obtained promises of assistance from refugee resettlement organizations. An estimated 24,000 refugees have obtained such promises.

The Supreme Court handed Trump a partial win in June when it allowed the administration to temporarily block people from six predominantly Muslim countries from entering the US. But the court carved out an exemption for people with a “bona fide relationship” with a person or entity in the country.

The federal district court judge in Hawaii who blocked Trump’s order in March further weakened it in July by including grandparents, grandchildren, brothers-in-law, sisters-in-law, aunts, uncles, nieces, nephews and cousins of people in the US and refugees working with resettlement agencies in the definition of what constitutes a bona fide relationship.

Monday's ruling concerned the definition of a "bona-fide" relationship. The state of Hawaii felt having an arrangement with a resettlement agency constituted such a connection; the Trump administration did not. The Supreme Court agreed with the Trump administration – at least for Monday.

The Trump administration's travel ban blocks travelers from Iran, Libya, Somalia, Sudan, Syria and Yemen from entering the US for 90 days.