The impending shutdown of the U.S. Government and the consequential furloughing of thousands of federal employees will affect various federal agencies in different ways as explained here. There are four main U.S. agencies that engage in U.S. immigration-related services: the Department of Homeland Security, the Department of Justice, the Department of State, and the Department of Labor. The federal courts also hear immigration-related cases. To learn more about how a shutdown will affect the various federal agencies that engage in immigration-related services, watch the following short video:
