Trump tweets boast as court reinstates 'Muslim travel ban'

The US Supreme Court has partially reinstated President Donald Trump's controversial travel ban targeting citizens from six predominantly Muslim countries.

Since the reinstatement President Trump has taken to social media to claim the victory Tweeting, “We must keep American SAFE!”

Also in reaction to Monday's ruling, Trump released a statement saying he felt vindicated by what he called "a clear victory for our national security."

Donald Trump pauses between signing executive orders at the White House. Photo: AAP

"It allows the travel suspension for the six terror-prone countries and the refugee suspension to become largely effective," Trump reiterated.

"As president, I cannot allow people into our country who want to do us harm."

Trump's revised measure, initially announced in March, sought to bar from US entry travelers from Iran, Libya, Somalia, Sudan, Syria and Yemen for 90 days, as well as suspend the entry of refugees for 120 days.

However the Supreme Court has also stated it would examine the case in full in October but said the ban could now be enforced for travelers from the targeted countries "who lack any bona fide relationship with a person or entity in the United States."

The court tempered its ruling by saying the ban could not be implemented for now against people who have personal links to the US, citing the examples of foreign nationals wishing to visit family or students accepted to attend university.

But the Supreme Court's decision nonetheless marks a win for the Republican leader, who has insisted the ban is necessary for national security, despite criticism that it singles out Muslims in violation of the US constitution.

RELATED LINKS:

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.

Even without the ban in place, arrivals from the six countries has dropped sharply, in part due to the "extreme vetting" approach of US authorities, toughening their scrutiny of visa applicants.

Arrivals from Iran, Libya, Somalia, Sudan, Syria and Yemen were down by nearly half in March and April from a year ago - 6,372 for the two months compared to 12,100 in 2016, according to recent official data.

RELATED VIDEO: