US President Donald Trump is scheduled to address the United Nations General Assembly on Tuesday. The speech comes at a tumultuous moment for the world and for his presidency, according to a report on the address.

The report says the global economy has been shaken by Trump's decision to launch a war against Iran. It also cites surging anxiety about the social impact of artificial intelligence and lingering questions about the future of the United Nations as Trump scales back US financial support for the body.

A White House official, speaking on condition of anonymity because they were not authorized to comment publicly, said Trump intends to use the address to underscore that "he is using American power to confront longstanding challenges and reshape the world to America's benefit."

As he arrived at the UN, Trump briefly spoke to reporters, saying it was an honor to address the world body. His attention then shifted to his resentments with the news media, the report said.