The Drug Enforcement Administration (DEA) is a United States federal law enforcement agency under the U.S. Department of Justice, tasked with combating drug smuggling and use within the United States. Not only is the DEA the lead agency for domestic enforcement of the Controlled Substances Act, sharing concurrent jurisdiction with the Federal Bureau of Investigation (FBI) and Immigration and Customs Enforcement (ICE), it also has sole responsibility for coordinating and pursuing U.S.