Voters should care about this bill because it defines the appropriate role of the military within the United States. If this bill becomes law, it would solidify the principle that the military is primarily for national defense and not for domestic law enforcement, particularly concerning immigration. This means that issues at the border would need to be addressed by civilian agencies, like Border Patrol, rather than military personnel.

Without this law, there could be more instances where military members are deployed to perform tasks that critics argue fall outside their traditional defense role, potentially blurring the lines between military and civilian authority. If it doesn't pass, the Executive Branch would retain more flexibility to use the military, including the National Guard, in supporting or directly enforcing immigration laws, which some view as an efficient use of resources and others see as a dangerous militarization of domestic issues.