A Somali referee was on Monday dropped from the World Cup after he was denied entry to the United States, reigniting concerns about how Donald Trump's immigration crackdown could disrupt the tournament.

Omar Artan was set to become the first Somalian to officiate a World Cup match. He was denied entry to the United States on Monday at Miami International Airport.

Award-winning Somali referee Omar Artan, set to be the first from his country to officiate at the World Cup finals, was denied entry to the United States, a sports ministry…