Jennifer K. Elsea, Cong. Research Serv., LSB10267, Definition of National Emergency under the National Emergencies Act (2019)
Emily E. Roberts, Cong. Research Serv., LSB10252, Declarations under the National Emergencies Act, Part 1: Declarations Currently in Effect (2019)
Emily E. Roberts, Cong. Research Serv., LSB10253, Declarations Under the National Emergencies Act, Part 2: Declarations No Longer in Effect (2019)
Ben Harrington, Cong. Research Serv., LSB10283, Can the President Close the Border? Relevant Laws and Considerations (2019)