President Trump will meet with United Nations Security Council diplomats on Monday as part of an effort to rally an international coalition against Iran.

The meeting, which will be Trump’s second working lunch with the Security Council, comes in the middle of a two-track effort in Congress and with European allies to address flaws that the Trump administration perceives in the nuclear deal negotiated by former President Barack Obama’s team. It’s one stop on a trip that Ambassador Nikki Haley arranged to highlight Iran’s role in conflicts around the Middle East.