Last week, President Donald Trump signed a proclamation listing Nigeria among six countries whose nationals would be subjected “to certain restrictions, limitations, and exceptions” regarding emigration to the United States. Justification for the decision, according to the White House, is that Nigeria does not comply with the established identity-management and information-sharing criteria, does not adequately share public-safety and terrorism-related information, and “also presents a high risk, relative to other countries in the world, of terrorist travel to the United States.”