From the Summary: "Congress shaped U.S. national security policy toward several critical crises and contingencies in the Middle East and North Africa (MENA) during the decade from 2011 through 2020--a period of upheaval, conflict, and change in that region. [...] Congress may examine the experiences over the decade to assess the results of its use of legislative tools to influence U.S. foreign policy. Analysis of case studies of various specific legislative interventions in specific events and countries shows use of a range of congressional policy tools with varied outcomes. Key considerations include how chosen congressional policy tools relate to executive branch-led foreign relations initiatives and the effects that country- and context-specific factors may have on policy results."
CRS Report for Congress, R46796
Congressional Research Service: https://crsreports.congress.gov/