The entity responsible for enforcing federal laws in the United States is the executive branch, led by the President. This branch is tasked with the administration and enforcement of laws passed by Congress, ensuring that federal statutes are implemented. The Department of Justice, headed by the Attorney General, plays a critical role in legal enforcement, particularly in matters related to criminal justice and civil rights. Additionally, various federal agencies, such as the FBI and the DEA, focus on specific areas of law enforcement, contributing to a comprehensive approach to enforcing federal laws throughout the country.