On September 24, 2017, the President issued a Presidential Proclamation titled “Enhancing Vetting Capabilities and Processes for Detecting Attempted Entry into the United States by Terrorists or other Public-Safety Threats.” Per Section 2 of Executive Order 13780 of March 6, 2017 (Protecting the Nation from Foreign Terrorist Entry Into The United States), a global review was conducted to determine what additional information is needed from each foreign country to assess whether foreign nationals who seek to enter the United States pose a security or safety threat. As part of that review, the Department of Homeland Security (DHS) developed a comprehensive set of criteria to evaluate the information-sharing practices, policies, and capabilities of foreign governments on a worldwide basis. At the end of that review, which included a 50-day period of engagement with foreign governments aimed at improving their information sharing practices, there were seven countries whose information sharing practices were classified as “inadequate” and for which the President deemed it necessary to impose certain restrictions on the entry of nonimmigrants and immigrants who are nationals of these countries. The President also deemed it necessary to impose restrictions on one country due to the "special concerns" it presented. These restrictions are considered important to addressing the threat these existing information-sharing deficiencies, among other things, present to the security and welfare of the United States and pressuring host governments to remedy these deficiencies.

FAQs on the Executive Order - Department of Homeland Security