At UN General Assembly, Biden asks world to stand with Ukraine

US President Joe Biden appealed to world leaders at the UN General Assembly on Tuesday to stand with Ukraine against Russian invaders, hoping Republicans in Congress will also take notice.

"Russia believes that the world will grow weary and allow it to brutalise Ukraine without consequence," Biden said in his speech to UNGA. "If we allow Ukraine to be carved up, is the independence of any nation secure?"

Biden drew applause when saying that the United States and its allies would stand with Ukraine's fight for freedom. "Russia alone bears responsibility for this war," the president said. "Russia alone has the power to end this war immediately."

Biden's address at the annual gathering was the centre piece event of his three-day visit to New York, which will include meetings with the heads of five Central Asian nations, and the leaders of Israel and Brazil.

Biden, a Democrat, has made rallying US allies to support Ukraine a leading component of US foreign policy, arguing the world must send a clear signal to Russian President Vladimir Putin that he will not be able to outlast the West.

Biden has faced criticism from some Republicans who want the United States to spend less money on the war effort.

Former President Donald Trump, the front-runner for the Republican nomination in the 2024 presidential election, has vowed to seek a quick end to the war if returned to power.

Trump has voiced skepticism about Washington's engagement with traditional allies, including NATO, and has been complimentary of Putin.

House of Representatives Speaker Kevin McCarthy, the leading Republican in Washington, has questioned whether the United States should keep sending billions of dollars in weaponry to Ukraine.