The American Citizens First Act aims to tighten immigration policies and limit federal benefits for noncitizens. Its main objectives include ending federal assistance for noncitizens, allowing for the denaturalization of citizens who disrupt public order, expanding the authority for expedited removal of undocumented immigrants, conducting security reviews for Afghan nationals, and automatically terminating temporary protected status for certain groups. One of the key provisions of the Act is the termination of federal benefits for anyone who is not a U.S. citizen.