Elected on the nationalist slogan "America first," President Donald Trump will use his debut address to the UN General Assembly to argue that individual nations should act in their own self-interest, yet rally together when faced with a common threat such as North Korea.
Mr Trump, who has warned of "fire and fury" if North Korea does not back down, is expected to argue on Tuesday that the dangers posed by Kim Jong-un's pursuit of a nuclear weapons program should unite all nations.
And he plans to issue not just warnings to North Korea but also rebukes to states that have enabled Pyongyang, though it is unclear if he will criticise China by name.
Addressing the General Assembly is a milestone moment for any president, but one particularly significant for Mr Trump, a relative newcomer to foreign policy who has at times rattled the international community with his unpredictability.
He has pulled the Unites States out of multinational agreements, considered shrinking the US military footprint in the world and deployed bombastic language on North Korea that has been criticised by other world leaders.
Mr Trump frequently belittled the UN as a candidate and some within his White House believe the UN acts as a global bureaucracy that infringes on the sovereignty of individual countries.
But the president is expected to stand before world leaders and a global audience and declare that UN members, acting as a collection of self-interested nations, should unite to confront global dangers, according to aides previewing his speech.
Beyond North Korea, crisis points the Republican president plans to address include Iran's nuclear agenda, the instability in Venezuela and the fight against terrorism in Syria and elsewhere.
World leaders, many of whom will be seeing Mr Trump in person for the first time, are bound to take the measure of the man and parse his every word for clues on how he views the US role in the world and within the UN.
In brief remarks to the UN on Monday, Mr Trump chastised the world body's bloated bureaucracy and budget, saying: "We are not seeing the results in line with this investment."
But even with that scolding, Mr Trump pledged to the UN that the United States would be "partners in your work" to make the organisation a more effective force for world peace.
