U.S. Strategy for Engagement in Central America: Policy Issues for Congress [Updated November 12, 2019] [open pdf - 2MB]
From the Summary: "Central America has received renewed attention from U.S. policymakers over the past few years as the region has remained a major transit corridor for illicit drugs and has surpassed Mexico as the largest source of irregular migration to the United States. These narcotics and migrant flows are the latest symptoms of deep-rooted challenges in several countries in the region, including widespread insecurity, fragile political and judicial systems, and high levels of poverty and unemployment. The U.S. government has worked more closely with partners in Central America to address those challenges since 2014, making some tentative progress. The region is now at serious risk of backsliding, however, as the Trump Administration has begun to withdraw U.S. diplomatic pressure and foreign aid while some Central American officials have begun to undermine anti-corruption campaigns and other structural reforms."
CRS Report for Congress, R44812
Congressional Research Service: https://crsreports.congress.gov/