Which agency is primarily responsible for interior enforcement of immigration laws?

The correct answer is Immigration and Customs Enforcement (ICE) because it plays a pivotal role in the enforcement of immigration laws within the interior of the United States. ICE is tasked with investigating and enforcing laws related to immigration, customs, and related criminal offenses. Its responsibilities include detaining individuals who are in the U.S. unlawfully, conducting investigations into immigration fraud, and carrying out deportations.

While U.S. Customs and Border Protection (CBP) is primarily focused on border enforcement and preventing illegal entry into the U.S., ICE specifically targets unlawful immigration occurring within the country. Similarly, the Federal Bureau of Investigation (FBI) has a broader mandate that includes national security and criminal investigations but does not focus solely on immigration enforcement. The Department of Homeland Security (DHS) is the overarching department that includes both ICE and CBP, but it does not directly enforce immigration laws; instead, ICE is the specific agency designated for this purpose within the interior.