Which office is responsible for the enforcement of federal law?

The Department of Justice is primarily responsible for the enforcement of federal law in the United States. This office oversees the federal criminal justice system, including the prosecution of federal crimes, the representation of the United States in civil litigation, and the enforcement of laws related to civil rights, immigration, and antitrust, among others.

Within the Department of Justice, the Federal Bureau of Investigation (FBI) and the Drug Enforcement Administration (DEA) work specifically on law enforcement matters. The Attorney General, the head of the Department of Justice, is the chief law enforcement officer of the federal government and plays a critical role in ensuring that federal laws are implemented and enforced consistently across the country.

Other departments mentioned, like the Department of State, primarily focus on foreign affairs and diplomacy; the Department of Defense centers on national security and military operations; and the Department of Homeland Security is focused on securing the nation from threats, which includes enforcement of specific laws related to immigration and border security. However, none of these departments have the comprehensive responsibility for federal law enforcement that the Department of Justice possesses.