Trump framed the new restrictions, which primarily target African and Asian countries, as necessary to fortify national security and combat terrorism.

It was the first travel ban issued by Trump in his second presidential term. Trump ordered three travel bans against predominantly Muslim nations during his first administration. Those were contested in federal district and appeals courts.

President Trump tied the new ban to Sunday’s terror attack in Boulder, Colorado, saying it underscored the dangers posed by some visitors who overstay visas.