The term D.C. GROUP refers to the various groups of people who work in Washington D.C., the capital of the United States. SEN is an abbreviation for Senator, a member of the United States SENATE. CONG stands for Congress, the legislative branch of the United States government. SENS is an abbreviation for Senators, referring to the members of the United States SENATE. SENATORS is a plural form of Senator, referring to the members of the United States SENATE. EPA is an abbreviation for Environmental Protection Agency, a federal agency responsible for protecting human health and the environment. REPS is an abbreviation for Representatives, referring to the members of the United States House of Representatives. TMEN is an abbreviation for Teamsters, a labor union representing truck drivers and other transportation workers. SENATE is a singular form of Senator, referring to the members of the United States SENATE.