This year’s high-level session of the United Nations General Assembly, which will see world leaders gather in New York later this month, is very unlikely to resolve the world’s problems. Could it actually make some of them worse?

The “UNGA” jamboree is always a bit of a circus. Presidents and prime ministers reel off their country’s achievements and grudges to overworked diplomats. But these meetings occasionally deliver concrete diplomatic results. In 2015, the Obama administration used UNGA to nudge leaders towards agreeing an ambitious climate change agreement in Paris by the end of the year.

It is hard to see the United States shaping more big multilateral bargains through UNGA in the near future. Last year, President Donald Trump used his speech to fellow leaders to belittle the Iranian nuclear deal and threaten North Korea with total destruction. Fellow leaders were genuinely shocked by his rhetoric and will be bracing for more of the same — or even worse — this month.

The US says that the president will make three main appearances, and his comments will likely dominate coverage of the event inside and outside the US. On Monday, Sept. 24, Trump is expected to lead a discussion on global drug problems. This session may largely be aimed at a domestic audience worried by the US drug crisis as the midterms loom.

Then, on Sept. 25, the president will make his main speech to the assembly, before chairing a Security Council session on proliferation the next day. The US originally planned to focus the council session on the Middle East, risking a clash with allies, including France and the United Kingdom, over the Iranian nuclear deal. Presumably worrying Trump could look isolated, the US mission to the UN has broadened the agenda.

Nonetheless, Trump will surely have harsh words for Tehran in both UNGA and the council. It is harder to predict what he will say about the Korean situation. Since threatening Pyongyang at the UN last year, Trump has oscillated wildly between attacking and praising North Korean leader Kim Jong-un. With little real progress in nuclear talks, the president could use UNGA to ratchet up pressure on Kim — who will not be in New York unless he has a very, very big surprise indeed up his sleeve — or try to charm him with compliments.

Some of Trump’s other talking points are rather more predictable. He will almost certainly sternly defend Israel, although his administration’s new Middle East peace plan is still not ready for publication. He is also likely to tell other leaders that they need to do more about the ongoing breakdown of Venezuela, an issue he raised in his 2017 speech.

While Trump’s speeches, and any attendant tweets, will probably be the main attractions at the UN, a spike of violence in Syria threatens to overshadow proceedings. In 2016, the siege of Aleppo cast a pall over UNGA. This year, the imminent Syrian-Russian assault on Idlib could have an even bleaker effect, demonstrating the UN’s weakness in the face of a humanitarian catastrophe.

