The following is the March 22, 2023, Congressional Research Service report, Iran: Background and U.S. Policy.
From the report
Congress has played a key role in shaping U.S. policy toward Iran, providing for extensive U.S. sanctions, providing aid and authorizing arms sales to partners threatened by Iran, seeking to influence negotiations over Iran’s nuclear program, and enacting legislation that allows Congress to review related agreements. In addition to Iran’s nuclear program, its government’s...
https://news.usni.org/2023/03/23/report-to-congress-on-iran-and-u-s-policy