On Friday, the U.S. Department of Homeland Security (DHS) Acting Secretary Chad F. Wolf announced that President Donald J. Trump signed a proclamation, which places new tailored visa restrictions on six countries that failed to meet a series of security criteria, demonstrating that they could be a risk to the homeland.
The Acting Secretary Wolf also announced that the Department had updated the methodology it used to assess compliance with the security criteria established under Executive Order 13780 in 2017. This enhanced review process raises the bar for global security by requiring nations to meet the Department’s stronger security standards and by making it clear to countries what they must do to meet those standards. The updated criteria enhance our screening and vetting capabilities and allow DHS to better identify terrorists and criminals attempting to enter the United States.
Here’s the reason stated for Nigeria.
Nigeria: Nigeria does not comply with the established identity-management and information-sharing criteria assessed by the performance metrics.
Suspension of entry for Immigrants, except as Special Immigrants whose eligibility is based on having provided assistance to the U.S. Government.