Donald Trump makes his big comeback to the UN General Assembly podium on Tuesday, where the US president intends to denounce "globalist institutions" and meet with Ukrainian President Volodymyr Zelensky as patience with Russia wears thin.

Trump will address the United Nations for the first time since he returned to office and quickly took to slashing the US role in international organizations.

It will be Trump's second time seeing Zelensky since the US leader invited Russian President Vladimir Putin on August 15 to Alaska, a meeting that broke Moscow's isolation in the West but yielded no breakthrough on Ukraine.

Russia has not only kept up its barrage of attacks on Ukraine in the past month but has increasingly raised fears in Western Europe, with drone or air incursions in NATO members Poland, Estonia and Romania.

Mike Waltz, newly installed as the US ambassador to the United Nations, voiced solidarity with NATO allies over the airspace violations.

"The United States and our allies will defend every inch of NATO territory," said Waltz, who was earlier Trump's national security advisor.

Trump took office vowing that he could end within........

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