From the Document: "U.S. interests in Latin America and the Caribbean are diverse and include economic, political, security, and humanitarian concerns. Geographic proximity has ensured strong economic linkages between the United States and the region, with the United States being a major trading partner and source of foreign investment for many Latin American and Caribbean countries. Free trade agreements (FTAs) have augmented U.S. economic relations with 11 countries in the region. The Western Hemisphere is a large source of U.S. immigration, both legal and illegal; geographic proximity and economic and security conditions are major factors driving migration trends. Curbing the flow of illicit drugs from Latin America and the Caribbean has been a key component of U.S. relations with the region and a major interest of Congress for more than four decades. The flow of illicit drugs, including heroin, methamphetamine, and fentanyl from Mexico and cocaine from Colombia, poses risks to U.S. public health and safety. Since 2000, Colombia has received support through Plan Colombia and its successor programs. For over a decade, the United States also has sought to forge close partnerships with other countries to combat drug trafficking and related violence and advance citizen security. These include the Mérida Initiative, begun in 2007 to support Mexico; the Central America Regional Security Initiative (CARSI), begun in 2008; and the Caribbean Basin Security Initiative (CBSI), begun in 2009."
CRS In Focus, IF10460
Congressional Research Service: https://crsreports.congress.gov/