Multiple former Trump administration officials believe the Biden administration needs to do more to prevent Iran from retaliating against them in response to the assassination of Gen. Qassem Soleimani.

The U.S. military carried out an airstrike in January 2020 targeting Soleimani, the commander of the Islamic Revolutionary Guard Corps’s Quds Force, and Tehran vowed to avenge his killing by going after the Trump administration officials involved in the strike — a threat that remains active to this day.