According to an unnamed senior U.S. official, after the bombing of Kata'ib Hezbollah in late December 2019, a security briefing was convened at President Trump's Mar-a-Lago estate where he and his advisors, including Secretary of State Mike Pompeo, Defense Secretary Mark Esper, and chairman of the joint chiefs of staff General Mark Milley discussed how to respond to Iran's alleged role in sponsoring anti-U.S. attacks in Iraq.