CRS Legal Sidebar: “U.S. Immigration and Customs Enforcement (ICE), a component of the Department of Homeland Security (DHS), is primarily responsible for immigration enforcement in the interior of the United States. ICE has considerable authority to arrest and detain aliens identified for removal. While DHS’s immigration enforcement priorities may change over time depending on the executive branch’s policy objectives, the governing statutory authorities for ICE’s enforcement actions have largely remained constant. This Legal Sidebar provides an overview of ICE’s authority to conduct arrests and other enforcement actions. (A separate DHS entity, U.S. Customs and Border Protection [CBP], enforces federal immigration laws at or near the border and at U.S. ports of entry; a discussion of CBP’s authorities can be found .)…”