From the Introduction: "Successive U.S. Administrations have identified Iran as a significant national security challenge. The Trump Administration has articulated its assessment of the threat posed by Iran in testimony by U.S. officials, statements, and reports such as an annual Defense Department report on Iran's military power required by successive National Defense Authorization Acts (NDAAs) and a State Department report (2018 and 2020) entitled 'Outlaw Regime: A Chronicle of Iran's Destructive Activities.' This report analyzes Iran's foreign and defense policies and capabilities to implement its policies."
CRS Report for Congress, R44017
Congressional Research Service: https://crsreports.congress.gov/