Trump said, on Twitter, that he would focus on Iran; while announcing he will chair a UN Security Council meeting that will be held on September 26.

"I am sure that's going to be the most watched Security Council meeting ever," US Ambassador to the United Nations Nikki Haley told reporters. But despite the unpredictable nature of Trump, some diplomats aren't expecting a reality television performance in the Security Council, where nearly every member is likely to be represented by their prime minister or president except Russia and China, which are expected to send ministers.
 
It is rare for the council to meet at the head-of-state and government level. This will be the third time the body is chaired by a US president. It has the ability to impose sanctions or authorize the use of military force.