>> President Trump set to make his second appearance, at the annual gathering of world leaders at the United Nations this week, a year after incendiary remarks directed at North Korea.>> Rocket man is on a suicide mission for himself.>> A vow to pull out of the multilateral Iran nuclear deal.
>> That deal is an embarrassment.>> And a promise to go it alone on other global issues.>> I will always put America first.>> But despite warnings from some diplomats, the American president is expected to double down on his America First policy, which some European leaders see as a threat to multilateralism.
Reuters UN correspondent Michelle Nichols.>> We are told that this year he is going to be touting US sovereignty when he takes to the podium in the UN General Assembly in front of 192 other countries. This is very similar to what he sort of pushed last year to key aspect of his America First policy.
The message of sovereignty is something that we hear a lot from countries like Russia and China, particularly in the Security Council. A senior UN official told me the other day, there's so many world crises going on at the moment, we do work better collectively when we tackle these crises together.
>> In the past year, Trump has followed through on threats to withdraw from multilateral agreements including the Iran nuclear deal, the UN Human Rights Council, and the UN Cultural Agency to name a few.>> He's long been sceptical of the United Nations His US Ambassador Nikki Haley told Reuters that she showed him the value of the United Nations when she was able to push through several Security Council resolutions last year toughening sanctions on North Korea.
But then at the same time, they have tried to push the United Nations to call out Iran over the US accusations that it's meddling in the Middle East. And they've so far been unsuccessful in that.>> Trump will also, for the first time, chair a UN Security Council meeting on nonproliferation of weapons of mass destruction that will provide him a new platform to attack Iran, which European diplomats said they fear will further demonstrate the disunity of the West.
> Under UN rules, Iranian President Hassan Rouhani is entitled to a seat at the meeting and can be called on by Trump, though officials say it's unlikely Rouhani will show up.