From the Overview: "The kingdom of Saudi Arabia's relations with the United States, the country's stability, and its future trajectory are subjects of continuing congressional interest. In particular, Saudi leadership transitions, Saudi human rights practices and reform plans, and assertive foreign policies, along with trends in global oil markets, shared threats from transnational terrorist groups, and Saudi-Iranian tensions have fueled recent congressional discussions. U.S.-Saudi security cooperation and U.S. concern for the continuing global availability of Saudi energy supplies continue to anchor official bilateral relations as they have for decades."
CRS Report for Congress, RL33533
Congressional Research Service: https://crsreports.congress.gov/