"In two years, my administration has accomplished more than nearly any administration in the history of our country", Trump began.
"We will examine what is working, what is not working, and whether the countries who receive our dollars and our protection also have our interests at heart", the president said of the US' massive foreign aid budget.
Trump has long decried past USA leaders - especially his predecessor, Barack Obama - for showing weakness on the world stage.
The US pulled out of the Iran nuclear deal in May, leaving the other countries who were signatories to the deal scrambling to make it work anyways. They do not respect their neighbours or borders, or the sovereign rights of nations.
World leaders literally laugh at Trump as he boasts about accomplishments at UN
President Donald Trump said Tuesday he had no plans to meet with Iranian leader Hassan Rouhani at the United Nations "despite requests" to do so. "That is why we are taking a hard look at United States foreign assistance", he said. Trump has said he expects to have another summit with Kim soon, although global watchdogs have stated North Korea hasn't backed off development of its nuclear program. Speaking just before Trump arrived at the podium, Guterres lamented the rise of populism and a fraying of worldwide cooperation - trends the USA president has fueled.
On Wednesday President Trump will chair a UN Security Council meeting, where the nuclear programs of Iran and North Korea will be the focus.
"We're doing very well with North Korea", Trump said, thanking leader Kim Jong Un, as well as China, South Korea and Japan for their help.
"What Iran says is clear: no war, no sanctions, no threats, no bullying; just acting according to the law and the fulfilment of obligations", Rouhani said.
His remarks elicited laughter from the world leaders gathered in the UN General Assembly hall for the General Debate.