Trump Limits Africans Flooding into USA

WSJ reports, in a long paywalled article:

As a boy, Majok Bior escaped a country engulfed in war. As a gifted student, he won a full scholarship to Duke University and looked toward a dazzling future.

Bior studied computer science at the North Carolina campus during his freshman year and was a winger on an intramural soccer team. After finishing the fall semester of his sophomore year, Bior returned to Uganda for winter break. He played chess with friends and recounted the brutal winters and demands of chemistry class.

Then President Trump began to ban students from Africa, starting with South Sudan where Bior was born. He hasn’t returned to campus since.

Duke is a great American college. Why is it giving free college to Uganda students, and rejecting so many Americans?