What agencies is responsible for collecting tariffs on imports and combating smuggling and other illegal practices in international trade?

In the United States, the U.S. Customs and Border Protection (CBP) is the agency responsible for collecting tariffs on imports and combating smuggling and other illegal practices in international trade. CBP enforces laws related to trade, Immigration, and customs, ensuring compliance with trade regulations and protecting U.S. economic interests. Additionally, agencies like the U.S. Department of Commerce and the U.S. Trade Representative may also play roles in trade regulation and enforcement.